Nombre: Alex O'Brien
País: USA
Fecha de nacimiento: 07.03.70, 56 años
Dinero del premio: 3526390 $
Partidos totales: 325
ganar: 153
%: 47.08 %
País: USA
Fecha de nacimiento: 07.03.70, 56 años
Dinero del premio: 3526390 $
Partidos totales: 325
ganar: 153
%: 47.08 %
| año | resumen | Difícil | Arcilla | I. difícil | Alfombra | Césped | Acrílico |
| 2001 | 15/13 | 9/6 | 2/2 | 0/2 | 0/0 | 4/3 | 0/0 |
| 2000 | 22/16 | 12/9 | 0/1 | 2/1 | 3/2 | 5/3 | 0/0 |
| 1999 | 21/15 | 16/10 | 0/2 | 3/2 | 0/0 | 2/1 | 0/0 |
| 1998 | 16/23 | 14/14 | 0/3 | 0/2 | 0/0 | 2/4 | 0/0 |
| 1997 | 21/27 | 8/12 | 4/5 | 2/3 | 2/4 | 5/3 | 0/0 |
| 1996 | 18/10 | 15/6 | 0/0 | 0/2 | 3/2 | 0/0 | 0/0 |
| 1995 | 7/17 | 4/7 | 0/3 | 0/2 | 1/2 | 2/3 | 0/0 |
| 1994 | 17/24 | 6/10 | 1/5 | 5/2 | 2/3 | 3/4 | 0/0 |
| 1993 | 12/21 | 7/13 | 4/3 | 1/1 | 0/1 | 0/3 | 0/0 |
| 1992 | 3/5 | 3/3 | 0/0 | 0/1 | 0/0 | 0/1 | 0/0 |
| 1991 | 1/1 | 1/1 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| TOTAL | 153/172 | 95/91 | 11/24 | 13/18 | 11/14 | 23/25 | 0/0 |
| porc. % | 47.08 % | 51.08 % | 31.43 % | 41.94 % | 44 % | 47.92 % | 0 % |
Alex O'Brien / programado / pasado
| No se encontraron partidos |
Alex O'Brien form / superficie: Difícil
Alex O'Brien / superficie: Difícil
| 13.08.01 | c 1 | Alex O'Brien | Neville Godwin | 3-6, 6-3, 6-3 |  | match details |  Washington D.C. | Difícil |
| 13.08.01 | calif. | Alex O'Brien | Arvind Parmar | 7-66, 7-65 | | match details | ||
| 13.08.01 | 1er ronda | Alex Kim | Alex O'Brien | 3-6, 6-2, 6-4 |  | match details | ||
| 06.08.01 | c 1 | Cecil Mamiit | Alex O'Brien | 7-5, 6-1 | | match details | Cincinnati | Difícil |
| 23.07.01 | c 1 | Jim Thomas | Alex O'Brien | 6-3, 3-6, 6-3 | | match details | Los Angeles | Difícil |
| 02.04.01 | c 2 | Alex O'Brien | Kyle Spencer | 7-64, 6-3 | | match details | Calabasas | Difícil |
| 02.04.01 | calif. | Doug Bohaboy | Alex O'Brien | 6-3, 4-6, 6-3 | | match details | ||
| 05.03.01 | calif. | Alex O'Brien | Kevin Kim | 6-4, 7-63 | | match details | Scottsdale | Difícil |
| 05.03.01 | c 1 | Alex O'Brien | Giovanni Lapentti | 6-3, 6-3 | | match details | ||
| 05.03.01 | c 2 | Alex O'Brien | Tomas Zib | 6-4, 7-5 | | match details | ||
| 05.03.01 | 1er ronda | Guillermo Canas | Alex O'Brien | 6-76, 6-2, 6-2 | | match details | ||
| 15.01.01 | calif. | Alex O'Brien | Cyril Saulnier | 6-0, 6-4 | | match details |  Melbourne | Difícil |
| 15.01.01 | c 1 | Alex O'Brien | Zbynek Mlynarik | 3-6, 6-3, 6-4 | | match details | ||
| 15.01.01 | 1er ronda | Gianluca Pozzi | Alex O'Brien | 1-6, 7-67, 6-4, 6-2 | | match details | ||
| 15.01.01 | c 2 | Alex O'Brien | Kevin Ullyett | 6-1, 7-66 | | match details | ||
| 28.08.00 | c 2 | Alex O'Brien | Michael Kohlmann | 7-62, 6-3 | | match details | New York | Difícil |
| 28.08.00 | calif. | Fernando Gonzalez | Alex O'Brien | 6-4, 4-6, 6-2 | | match details | ||
| 28.08.00 | c 1 | Alex O'Brien | Damian Furmanski | 6-3, 7-66 | | match details | ||
| 14.08.00 | c 1 | Alex O'Brien | Jim Thomas | 6-3, 6-2 | | match details | Washington D.C. | Difícil |
| 14.08.00 | calif. | Alex O'Brien | Jared Palmer | 7-65, 4-6, 7-64 | | match details | ||
| 14.08.00 | 2da ronda | Jan-Michael Gambill | Alex O'Brien | 6-3, 5-7, 7-5 | | match details | ||
| 14.08.00 | 1er ronda | Alex O'Brien | Marcos Ondruska | 6-73, 6-4, 6-3 | | match details | ||
| 07.08.00 | c 1 | Martin Damm (1972) | Alex O'Brien | 6-4, 5-7, 6-3 | | match details | Cincinnati | Difícil |
| 24.07.00 | 1er ronda | Alex O'Brien | Andrew Ilie | 6-3, 6-2 | | match details | Los Angeles | Difícil |
| 24.07.00 | calif. | Paul Kilderry | Alex O'Brien | 6-3, 6-3 | | match details | ||
| 24.07.00 | c 1 | Alex O'Brien | Ignacio Hirigoyen | 6-4, 4-6, 6-3 | | match details | ||
| 24.07.00 | c 2 | Alex O'Brien | K.C. Corkery | 7-5, 6-3 | | match details | ||
| 24.07.00 | 2da ronda | Paul Goldstein | Alex O'Brien | 6-4, 6-2 | | match details | ||
| 20.03.00 | c 1 | Gianluca Pozzi | Alex O'Brien | 7-63, 7-65 | | match details | Miami | Difícil |
| 13.03.00 | c 1 | Jan-Michael Gambill | Alex O'Brien | 6-4, 6-1 | | match details | Indian Wells | Difícil |
| 06.03.00 | c 2 | Byron Black | Alex O'Brien | 6-3, 6-2 | | match details | Scottsdale | Difícil |
| 06.03.00 | c 1 | Alex O'Brien | Maximilian Abel | 7-65, 6-2 | | match details | ||
| 17.01.00 | c 2 | Alex O'Brien | Danai Udomchoke | 6-2, 6-4 | | match details | Melbourne | Difícil |
| 17.01.00 | calif. | Alex O'Brien | Julian Knowle | 6-2, 6-4 | | match details | ||
| 17.01.00 | 1er ronda | Axel Pretzsch | Alex O'Brien | 7-61, 6-2, 6-1 | | match details | ||
| 17.01.00 | c 1 | Alex O'Brien | Mariano Hood | 6-4, 6-3 | | match details | ||
| 06.12.99 | fin | Cecil Mamiit | Alex O'Brien | 7-5, 6-2 | | match details | Burbank | Difícil |
| 06.12.99 | 2da ronda | Alex O'Brien | Michael Joyce | 6-3, 6-1 | | match details | ||
| 06.12.99 | 1/4 | Alex O'Brien | Paul Goldstein | 6-2, 6-3 | | match details | ||
| 06.12.99 | 1/2 | Alex O'Brien | Bob Bryan | 6-2, 6-4 | | match details | ||
| 06.12.99 | 1er ronda | Alex O'Brien | Kevin Kim | 6-3, 6-2 | | match details | ||
| 18.10.99 | 1er ronda | Kevin Kim | Alex O'Brien | 1-6, 7-5, 6-3 | | match details | Houston | Difícil |
| 04.10.99 | 1er ronda | Daniel Melo | Alex O'Brien | 6-2, 3-6, 6-3 | | match details | Tulsa | Difícil |
| 27.09.99 | 1/4 | Mark Knowles | Alex O'Brien | 2-6, 6-4, 6-1 | | match details | San Antonio | Difícil |
| 27.09.99 | 1er ronda | Alex O'Brien | Jeff Coetzee | 6-2, 7-65 | | match details | ||
| 27.09.99 | 2da ronda | Alex O'Brien | Bob Bryan | 6-74, 6-2, 7-5 | | match details | ||
| 20.09.99 | 1/4 | Alex O'Brien | Marcos Ondruska | 6-2, 6-4 | | match details | Austin | Difícil |
| 20.09.99 | 1er ronda | Alex O'Brien | Adriano Ferreira | 6-1, 6-2 | | match details | ||
| 20.09.99 | 2da ronda | Alex O'Brien | Irakli Labadze | 6-4, 6-4 | | match details | ||
| 20.09.99 | 1/2 | Andre Sa | Alex O'Brien | 7-5, 3-2, Alex O'Brien - retirado | | match details | ||
| 02.08.99 | 2da ronda | Patrick Rafter | Alex O'Brien | 6-0, 6-2 | | match details |  Montreal | Difícil |
| 02.08.99 | 1er ronda | Alex O'Brien | Gianluca Pozzi | 7-5, 4-6, 6-3 | | match details | ||
| 26.07.99 | 1er ronda | Lleyton Hewitt | Alex O'Brien | 6-3, 6-2 | | match details | Los Angeles | Difícil |
| 19.07.99 | fin | Alex O'Brien | Max Mirnyi | 6-2, 6-2 | | match details | Winnetka | Difícil |
| 19.07.99 | 2da ronda | Alex O'Brien | Michael Russell | 6-1, 6-2 | | match details | ||
| 19.07.99 | 1/4 | Alex O'Brien | Mashiska Washington | 6-4, 6-4 | | match details | ||
| 19.07.99 | 1/2 | Alex O'Brien | Michael Tebbutt | 7-65, 6-3 | | match details | ||
| 19.07.99 | 1er ronda | Alex O'Brien | David Caldwell | 6-74, 6-4, 7-5 | | match details | ||
| 16.07.99 | 1/4 | Lleyton Hewitt | Alex O'Brien | 7-5, 6-4 | | match details | Davis Cup | Difícil |
| 15.03.99 | 1er ronda | Alex O'Brien | Sebastien Lareau | 7-5, 7-67 | | match details | Key Biscayne | Difícil |
| 15.03.99 | 2da ronda | Jan Siemerink | Alex O'Brien | 7-5, 7-5 | | match details | ||
| 01.03.99 | 1er ronda | Patrick Rafter | Alex O'Brien | 6-3, 6-4 | | match details | Scottsdale | Difícil |
| 23.11.98 | 2da ronda | Alex O'Brien | David Caldwell | 6-4, 6-0 | | match details | Burbank | Difícil |
| 23.11.98 | 1/4 | Alex O'Brien | Peter Tramacchi | 7-5, 6-4 | | match details | ||
| 23.11.98 | 1/2 | David Nainkin | Alex O'Brien | 6-2, 6-1 | | match details | ||
| 23.11.98 | 1er ronda | Alex O'Brien | Christian Ruud | 6-3, 7-65 | | match details | ||
| 16.11.98 | 1er ronda | Jan Apell | Alex O'Brien | 6-0, 6-4 | | match details | Rancho Mirage | Difícil |
| 12.10.98 | 1er ronda | Ville Liukko | Alex O'Brien | 6-3, 6-1 | | match details | San Diego | Difícil |
| 05.10.98 | 1er ronda | Mashiska Washington | Alex O'Brien | 4-6, 7-5, 6-0 | | match details | San Antonio | Difícil |
| 28.09.98 | 1er ronda | Doug Flach | Alex O'Brien | 3-6, 6-4, 6-4 | | match details | Dallas | Difícil |
| 31.08.98 | 2da ronda | Richard Krajicek | Alex O'Brien | 6-1, 7-65, 6-2 | | match details | New York | Difícil |
| 31.08.98 | 1er ronda | Alex O'Brien | Leander Paes | 7-5, 6-3, 7-67 | | match details | ||
| 17.08.98 | 1er ronda | Alex O'Brien | Max Mirnyi | 6-3, 6-4 | | match details | New Haven | Difícil |
| 17.08.98 | 2da ronda | Gustavo Kuerten | Alex O'Brien | 6-3, 6-2 | | match details | ||
| 10.08.98 | 1er ronda | Alex Corretja | Alex O'Brien | 6-3, 6-73, 7-67 | | match details | Cincinnati | Difícil |
| 03.08.98 | 3er ronda | Richard Krajicek | Alex O'Brien | 3-6, 6-2, 6-3 | | match details | Toronto | Difícil |
| 03.08.98 | 2da ronda | Alex O'Brien | Ramon Delgado | 6-1, 4-6, 7-5 | | match details | ||
| 03.08.98 | 1er ronda | Alex O'Brien | Gustavo Kuerten | 6-3, 7-62 | | match details | ||
| 27.07.98 | 1er ronda | Mark Knowles | Alex O'Brien | 7-65, 2-6, 6-4 | | match details | Winnetka | Difícil |
| 13.07.98 | 1er ronda | Jaymon Crabb | Alex O'Brien | 6-4, 3-6, 6-4 | | match details | Aptos | Difícil |
| 13.04.98 | 1er ronda | Alex O'Brien | Oscar Burrieza-Lopez | 6-2, 6-0 | | match details |  Tokyo | Difícil |
| 13.04.98 | 2da ronda | Mikael Tillstrom | Alex O'Brien | 5-7, 6-4, 6-4 | | match details | ||
| 06.04.98 | 1er ronda | Geoff Grant | Alex O'Brien | 7-5, 6-1 | | match details |  Hong Kong | Difícil |
| 02.02.98 | 1/2 | Alex O'Brien | Doug Flach | 6-71, 6-3, 6-4 | | match details | West Bloomfield | Difícil |
| 02.02.98 | 1er ronda | Alex O'Brien | David Sanchez-Munoz | 6-4, 6-3 | | match details | ||
| 02.02.98 | fin | Alex O'Brien | Grant Doyle | 4-6, 6-3, 6-4 | | match details | ||
| 02.02.98 | 2da ronda | Alex O'Brien | Eyal Ran | 6-2, 1-6, 6-1 | | match details | ||
| 02.02.98 | 1/4 | Alex O'Brien | Gabriel Trifu | 6-3, 7-65 | | match details | ||
| 19.01.98 | 1er ronda | Alex O'Brien | Jan-Michael Gambill | 3-6, 7-5, 6-1, 6-3 | | match details | Melbourne | Difícil |
| 19.01.98 | 2da ronda | Steve Campbell | Alex O'Brien | 6-4, 6-3, 6-4 | | match details | ||
| 25.08.97 | 1er ronda | Marcelo Filippini | Alex O'Brien | 6-2, 6-4, 6-4 | | match details | New York | Difícil |
| 18.08.97 | 1er ronda | Jeff Tarango | Alex O'Brien | 6-2, 6-73, 6-3 | | match details | Boston | Difícil |
| 11.08.97 | 2da ronda | Marc-Kevin Goellner | Alex O'Brien | 7-5, 6-3 | | match details | New Haven | Difícil |
| 11.08.97 | 1er ronda | Alex O'Brien | Ivan Ljubicic | 6-3, 6-1 | | match details | ||
| 04.08.97 | 1er ronda | Daniel Nestor | Alex O'Brien | 6-2, 6-1 | | match details | Cincinnati | Difícil |
| 28.07.97 | 1er ronda | Alex O'Brien | Arnaud Boetsch | 6-1, 6-2 | | match details | Montreal | Difícil |
| 28.07.97 | 2da ronda | Alex O'Brien | Marcos Ondruska | 6-4, 7-67 | | match details | ||
| 28.07.97 | 3er ronda | Michael Chang | Alex O'Brien | 4-6, 6-2, 6-3 | | match details | ||
| 21.07.97 | 1er ronda | Sargis Sargsian | Alex O'Brien | 6-4, 6-3 | | match details | Los Angeles | Difícil |
| 17.03.97 | 2da ronda | Vince Spadea | Alex O'Brien | 7-64, 7-5 | | match details | Key Biscayne | Difícil |
| 10.03.97 | 1er ronda | Alex O'Brien | Sergio Bruguera | 6-4, 6-4 | | match details | Indian Wells | Difícil |
| 10.03.97 | 2da ronda | Byron Black | Alex O'Brien | 3-6, 6-1, 7-63 | | match details | ||
| 03.03.97 | 1er ronda | Jonas Bjorkman | Alex O'Brien | 6-4, 1-6, 7-5 | | match details | Scottsdale | Difícil |
| 13.01.97 | 1er ronda | Karsten Braasch | Alex O'Brien | 3-6, 6-3, 6-4, 7-5 | | match details | Melbourne | Difícil |
| 06.01.97 | 1er ronda | Alex O'Brien | Grant Doyle | 6-4, 6-4 | | match details | Sydney | Difícil |
| 06.01.97 | 2da ronda | Alex O'Brien | Mikael Tillstrom | 6-4, 6-74, 6-4 | | match details | ||
| 06.01.97 | 1/4 | Tim Henman | Alex O'Brien | 1-6, 7-63, 6-4 | | match details | ||
| 01.01.97 | 2da ronda | Alex O'Brien | Thomas Johansson | 6-4, 3-6, 6-4 | | match details | Adelaide | Difícil |
| 01.01.97 | 1/4 | Todd Woodbridge | Alex O'Brien | 6-4, 6-4 | | match details | ||
| 01.01.97 | 1er ronda | Alex O'Brien | Marc-Kevin Goellner | 6-75, 6-4, 7-69 | | match details | ||
| 26.08.96 | 3er ronda | David Wheaton | Alex O'Brien | 1-6, 7-5, 6-1, 6-2 | | match details | U.S. Open | Difícil |
| 26.08.96 | 1er ronda | Alex O'Brien | Nicolas Lapentti | 6-4, 1-6, 6-4, 6-3 | | match details | ||
| 26.08.96 | 2da ronda | Alex O'Brien | MaliVai Washington | 6-3, 6-4, 5-7, 3-6, 6-3 | | match details | ||
| 19.08.96 | 1er ronda | Alex O'Brien | Magnus Gustafsson | 6-3, 7-65 | | match details | Canadian Open | Difícil |
| 19.08.96 | 2da ronda | Alex O'Brien | Byron Black | 7-62, 6-2 | | match details | ||
| 19.08.96 | 1/4 | Todd Martin | Alex O'Brien | 6-4, 6-4 | | match details | ||
| 19.08.96 | 3er ronda | Alex O'Brien | Mikael Tillstrom | 6-3, 2-6, 6-3 | | match details | ||
| 12.08.96 | fin | Alex O'Brien | Jan Siemerink | 7-66, 6-4 | | match details | New Haven | Difícil |
| 12.08.96 | 3er ronda | Alex O'Brien | Chuck Adams | 6-3, 2-6, 6-2 | | match details | ||
| 12.08.96 | 1/4 | Alex O'Brien | Yevgeny Kafelnikov | 6-4, 6-4 | | match details | ||
| 12.08.96 | 1er ronda | Alex O'Brien | Sargis Sargsian | 6-2, 3-6, 6-4 | | match details | ||
| 12.08.96 | 1/2 | Alex O'Brien | Mark Philippoussis | 7-64, 6-74, 6-4 | | match details | ||
| 12.08.96 | 2da ronda | Alex O'Brien | Arnaud Boetsch | 6-2, 6-1 | | match details | ||
| 05.08.96 | 2da ronda | Alex O'Brien | MaliVai Washington | MaliVai Washington - walk over | | match details | Cincinnati | Difícil |
| 05.08.96 | 3er ronda | Andre Agassi | Alex O'Brien | 6-75, 6-3, 6-0 | | match details | ||
| 05.08.96 | 1er ronda | Alex O'Brien | Mark Philippoussis | 6-4, 6-4 | | match details | ||
| 29.07.96 | 1/4 | Sandon Stolle | Alex O'Brien | 6-4, 6-3 | | match details | Los Angeles | Difícil |
| 29.07.96 | 1er ronda | Alex O'Brien | Nicolas Pereira | 6-2, 6-3 | | match details | ||
| 29.07.96 | 2da ronda | Alex O'Brien | Thomas Enqvist | 6-4, 4-6, 7-5 | | match details | ||
| 15.04.96 | 1er ronda | Lionel Roux | Alex O'Brien | 7-5, 5-7, 6-3 | | match details | Tokyo | Difícil |
| 11.03.96 | 1er ronda | Carlos Costa | Alex O'Brien | 7-65, 1-6, 7-5 | | match details | Indian Wells | Difícil |
| 28.08.95 | 1er ronda | Alex Corretja | Alex O'Brien | 6-4, 6-4, 6-3 | | match details | U.S. Open | Difícil |
| 14.08.95 | 1er ronda | Brett Steven | Alex O'Brien | 6-1, 6-2 | | match details | Indianapolis | Difícil |
| 07.08.95 | 2da ronda | Michael Chang | Alex O'Brien | 4-6, 6-4, 6-1 | | match details | Cincinnati | Difícil |
| 07.08.95 | 1er ronda | Alex O'Brien | Lionel Roux | 6-2, 6-2 | | match details | ||
| 13.03.95 | 1er ronda | Alex O'Brien | Christian Ruud | 7-5, 6-4 | | match details | Key Biscayne | Difícil |
| 13.03.95 | 2da ronda | David Wheaton | Alex O'Brien | 6-4, 6-2 | | match details | ||
| 16.01.95 | 2da ronda | Michael Stich | Alex O'Brien | 6-0, 6-3, 6-4 | | match details | Australian Open | Difícil |
| 16.01.95 | 1er ronda | Alex O'Brien | Pat Cash | 4-6, 6-4, 6-4, 6-2 | | match details | ||
| 09.01.95 | 2da ronda | Jan Siemerink | Alex O'Brien | 7-5, 6-3 | | match details | Auckland | Difícil |
| 09.01.95 | 1er ronda | Alex O'Brien | James Sekulov | 7-67, 6-4 | | match details | ||
| 02.01.95 | 1er ronda | Daniel Vacek | Alex O'Brien | 6-4, 5-7, 6-4 | | match details | Adelaide | Difícil |
| 29.08.94 | 2da ronda | Jonas Bjorkman | Alex O'Brien | 6-2, 6-3, 6-4 | | match details | U.S. Open | Difícil |
| 29.08.94 | 1er ronda | Alex O'Brien | Paul Haarhuis | 6-3, 7-61, 6-3 | | match details | ||
| 15.08.94 | 2da ronda | Patrick Rafter | Alex O'Brien | 6-4, 6-3 | | match details | New Haven | Difícil |
| 15.08.94 | 1er ronda | Alex O'Brien | Guy Forget | 3-6, 6-3, 7-66 | | match details | ||
| 08.08.94 | 3er ronda | Alex O'Brien | Thomas Enqvist | 6-4, 6-3 | | match details | Cincinnati | Difícil |
| 08.08.94 | 1/4 | Michael Stich | Alex O'Brien | 6-2, 6-4 | | match details | ||
| 08.08.94 | 2da ronda | Alex O'Brien | Brad Gilbert | 6-4, 6-1 | | match details | ||
| 01.08.94 | 1er ronda | Mark Woodforde | Alex O'Brien | 2-6, 6-4, 6-4 | | match details | Los Angeles | Difícil |
| 25.07.94 | 2da ronda | Karsten Braasch | Alex O'Brien | 1-6, 7-64, 7-65 | | match details | Canadian Open | Difícil |
| 25.07.94 | 1er ronda | Alex O'Brien | Albert Chang | 3-6, 6-2, 7-61 | | match details | ||
| 18.07.94 | 1er ronda | Bill Barber | Alex O'Brien | 6-4, 6-4 | | match details | Washington | Difícil |
| 07.03.94 | 1er ronda | Alex O'Brien | Mats Wilander | 6-3, 7-63 | | match details | Key Biscayne | Difícil |
| 07.03.94 | 2da ronda | Paul Haarhuis | Alex O'Brien | 6-0, 6-2 | | match details | ||
| 21.02.94 | 1er ronda | Fabrice Santoro | Alex O'Brien | 6-3, 5-7, 6-3 | | match details | Scottsdale | Difícil |
| 17.01.94 | 1er ronda | Goran Ivanisevic | Alex O'Brien | 6-1, 6-0, 6-2 | | match details | Australian Open | Difícil |
| 03.01.94 | 1er ronda | Jonathan Stark | Alex O'Brien | 7-64, 6-2 | | match details | Oahu | Difícil |
| 30.08.93 | 1er ronda | Kevin Ullyett | Alex O'Brien | 6-3, 5-7, 5-7, 6-1, 6-4 | | match details | U.S. Open | Difícil |
| 23.08.93 | 1er ronda | Sergio Bruguera | Alex O'Brien | 6-2, 6-3 | | match details | Long Island | Difícil |
| 16.08.93 | 1er ronda | Neil Borwick | Alex O'Brien | 7-5, 3-6, 6-3 | | match details | New Haven | Difícil |
| 09.08.93 | 1er ronda | Mark Woodforde | Alex O'Brien | 7-64, 6-4 | | match details | Cincinnati | Difícil |
| 02.08.93 | 2da ronda | Chuck Adams | Alex O'Brien | 7-5, 6-2 | | match details | Los Angeles | Difícil |
| 02.08.93 | 1er ronda | Alex O'Brien | Mark Woodforde | 7-63, 4-6, 6-2 | | match details | ||
| 26.07.93 | 1er ronda | Alex O'Brien | Tommy Ho | 7-5, 1-6, 6-4 | | match details | Canadian Open | Difícil |
| 26.07.93 | 2da ronda | Michael Chang | Alex O'Brien | 6-2, 6-3 | | match details | ||
| 12.04.93 | 1er ronda | Alex O'Brien | Sandon Stolle | 7-65, 5-7, 6-4 | | match details |  Hong Kong | Difícil |
| 12.04.93 | 2da ronda | David Wheaton | Alex O'Brien | 6-4, 6-3 | | match details | ||
| 05.04.93 | 2da ronda | Henrik Holm | Alex O'Brien | 6-2, 4-6, 6-3 | | match details | Tokyo | Difícil |
| 05.04.93 | 1er ronda | Alex O'Brien | Thomas Shimada | 6-4, 6-1 | | match details | ||
| 08.03.93 | 1er ronda | Aaron Krickstein | Alex O'Brien | 4-6, 6-3, 5-5, Alex O'Brien - retirado | | match details | Key Biscayne | Difícil |
| 01.03.93 | 1er ronda | David Wheaton | Alex O'Brien | 6-1, 7-5 | | match details | Indian Wells | Difícil |
| 22.02.93 | 2da ronda | Brad Gilbert | Alex O'Brien | 1-6, 7-5, 6-3 | | match details | Scottsdale | Difícil |
| 22.02.93 | 1er ronda | Alex O'Brien | Todd Woodbridge | 7-64, 1-0, Todd Woodbridge - retirado | | match details | ||
| 18.01.93 | 1er ronda | Michael Stich | Alex O'Brien | 6-4, 7-5, 6-2 | | match details | Australian Open | Difícil |
| 04.01.93 | 1er ronda | Alex O'Brien | Broderick Dyke | 7-64, 7-65 | | match details | Adelaide | Difícil |
| 04.01.93 | 2da ronda | Alex O'Brien | Richard Krajicek | 6-4, 6-4 | | match details | ||
| 04.01.93 | 1/4 | Jonathan Stark | Alex O'Brien | 6-2, 6-1 | | match details | ||
| 31.08.92 | 1er ronda | Jim Courier | Alex O'Brien | 4-6, 6-1, 6-3, 7-65 | | match details | U.S. Open | Difícil |
| 17.08.92 | 3er ronda | Fabrice Santoro | Alex O'Brien | 6-3, 6-3 | | match details | New Haven | Difícil |
| 17.08.92 | 1er ronda | Alex O'Brien | Yevgeny Kafelnikov | 6-2, 6-1 | | match details | ||
| 17.08.92 | 2da ronda | Alex O'Brien | Richard Krajicek | 7-63, 7-62 | | match details | ||
| 13.07.92 | 1er ronda | Alex O'Brien | Chuck Adams | 4-6, 7-62, 7-64 | | match details | Washington | Difícil |
| 13.07.92 | 2da ronda | Jim Grabb | Alex O'Brien | 6-3, 6-2 | | match details | ||
| 12.08.91 | 1er ronda | Alex O'Brien | Johan Kriek | 7-5, 6-2 | | match details | New Haven | Difícil |
| 12.08.91 | 2da ronda | Derrick Rostagno | Alex O'Brien | 7-65, 6-2 | | match details |