Nombre: Katie O'Brien
País: United Kingdom
Fecha de nacimiento: 02.05.86, 40 años
altura: 166 cm
peso: 61 kg
Diestro
WTA ranking: 407
TOP posición de la clasificación: 84 (08.02.10, 76900 puntos)
Puntos: 96
Dinero del premio: 525141 $
Partidos totales: 439
ganar: 229
%: 52.16 %
País: United Kingdom
Fecha de nacimiento: 02.05.86, 40 años
altura: 166 cm
peso: 61 kg
Diestro
WTA ranking: 407
TOP posición de la clasificación: 84 (08.02.10, 76900 puntos)
Puntos: 96
Dinero del premio: 525141 $
Partidos totales: 439
ganar: 229
%: 52.16 %
| año | resumen | Difícil | Arcilla | I. difícil | Alfombra | Césped | Acrílico |
| 2011 | 13/17 | 5/5 | 0/0 | 2/5 | 1/1 | 5/6 | 0/0 |
| 2010 | 18/30 | 13/18 | 1/3 | 3/5 | 0/0 | 1/4 | 0/0 |
| 2009 | 47/25 | 15/8 | 3/5 | 22/6 | 5/2 | 2/4 | 0/0 |
| 2008 | 29/37 | 11/16 | 5/7 | 10/7 | 1/3 | 2/4 | 0/0 |
| 2007 | 42/31 | 15/15 | 0/3 | 14/6 | 6/3 | 7/4 | 0/0 |
| 2006 | 37/30 | 19/16 | 1/1 | 12/6 | 3/2 | 2/5 | 0/0 |
| 2005 | 35/26 | 13/10 | 0/0 | 17/8 | 0/2 | 5/6 | 0/0 |
| 2004 | 5/9 | 4/5 | 0/0 | 1/1 | 0/0 | 0/3 | 0/0 |
| 2003 | 2/4 | 0/1 | 0/0 | 0/2 | 0/0 | 2/1 | 0/0 |
| 2002 | 1/1 | 0/0 | 0/0 | 1/1 | 0/0 | 0/0 | 0/0 |
| TOTAL | 229/210 | 95/94 | 10/19 | 82/47 | 16/13 | 26/37 | 0/0 |
| porc. % | 52.16 % | 50.26 % | 34.48 % | 63.57 % | 55.17 % | 41.27 % | 0 % |
Katie O'Brien / programado / pasado
| No se encontraron partidos |
Katie O'Brien form / año 2008
Katie O'Brien / año 2008
| 24.11.08 | 2da ronda | Katie O'Brien | Samantha Schoeffel | 1-6, 6-4, 6-4 |  | match details |  Saint Denis | Difícil |
| 24.11.08 | 1/4 | Arantxa Parra-Santonja | Katie O'Brien | 7-61, 7-5 |  | match details | ||
| 24.11.08 | 1er ronda | Katie O'Brien | Franziska Klotz | 6-0, 6-2 | | match details | ||
| 17.11.08 | 1er ronda | Katie O'Brien | Amanda Elliott | 6-0, 6-0 | | match details |  Phoenix | Difícil |
| 17.11.08 | 1/4 | Marinne Giraud | Katie O'Brien | 6-1, 6-1 | | match details | ||
| 17.11.08 | 2da ronda | Katie O'Brien | Camila Giorgi | 6-0, 6-3 | | match details | ||
| 27.10.08 | 1er ronda | Katie O'Brien | Ksenia Pervak | 6-4, 6-4 | | match details | Nantes | I. difícil |
| 27.10.08 | 2da ronda | Julia Goerges | Katie O'Brien | 6-1, 6-4 | | match details | ||
| 18.10.08 | c 1 | Eva Hrdinova | Katie O'Brien | 2-6, 6-4, 6-2 | | match details |  Linz | I. difícil |
| 13.10.08 | 2da ronda | Severine Beltrame | Katie O'Brien | 6-4, 6-2 | | match details | Saint Raphael | I. difícil |
| 13.10.08 | 1er ronda | Katie O'Brien | Eva Birnerova | 6-3, 4-6, 6-4 | | match details | ||
| 06.10.08 | 2da ronda | Katie O'Brien | Andrea Hlavackova | 6-3, 6-1 | | match details |  Barnstaple | I. difícil |
| 06.10.08 | 1/2 | Anne Keothavong | Katie O'Brien | 6-4, 6-4 | | match details | ||
| 06.10.08 | 1/4 | Katie O'Brien | Katalin Marosi | 6-2, 6-3 | | match details | ||
| 06.10.08 | 1er ronda | Katie O'Brien | Amanda Elliott | 6-1, 6-2 | | match details | ||
| 30.09.08 | 1er ronda | Raluca Olaru | Katie O'Brien | 6-2, 6-1 | | match details |  Tashkent | Difícil |
| 22.09.08 | 1er ronda | Katie O'Brien | Katalin Marosi | 7-61, 6-4 | | match details | Shrewsbury | I. difícil |
| 22.09.08 | 2da ronda | Kristina Barrois | Katie O'Brien | 7-5, 6-4 | | match details | ||
| 15.09.08 | 1er ronda | Sara Del Barrio-Aragon | Katie O'Brien | 6-1, 6-3 | | match details |  Madrid | Difícil |
| 21.08.08 | c 2 | Alexa Glatch | Katie O'Brien | 6-3, 6-4 | | match details |  New York | Difícil |
| 20.08.08 | c 1 | Katie O'Brien | Petra Martic | 3-6, 6-4, 6-0 | | match details | ||
| 09.08.08 | c 1 | Meng Yuan | Katie O'Brien | 6-2, 6-2 | | match details | Cincinnati | Difícil |
| 04.08.08 | 2da ronda | Yanina Wickmayer | Katie O'Brien | 7-63, 6-4 | | match details |  Monterrey | Difícil |
| 04.08.08 | 1er ronda | Katie O'Brien | Jorgelina Cravero | 6-1, 6-3 | | match details | ||
| 27.07.08 | calif. | Chanelle Scheepers | Katie O'Brien | 6-3, 4-6, 6-3 | | match details |  Montreal | Difícil |
| 26.07.08 | c 1 | Katie O'Brien | Danielle Mills | 6-4, 6-3 | | match details | ||
| 23.07.08 | 2da ronda | Vera Dushevina | Katie O'Brien | 6-3, 6-2 | | match details |  Portoroz | Difícil |
| 21.07.08 | 1er ronda | Katie O'Brien | Tsvetana Pironkova | 7-66, 4-6, 6-2 | | match details | ||
| 14.07.08 | 1er ronda | Katie O'Brien | Alexandra Panova | 1-6, 6-1, 6-4 | | match details |  Biella | Arcilla |
| 14.07.08 | 2da ronda | Barbora Strycova | Katie O'Brien | 6-3, 7-5 | | match details | ||
| 08.07.08 | 1er ronda | Lourdes Dominguez-Lino | Katie O'Brien | 5-7, 6-3, 6-0 | | match details | Palermo | Arcilla |
| 24.06.08 | 1er ronda | Shahar Peer | Katie O'Brien | 6-3, 7-5 | | match details | London | Césped |
| 16.06.08 | 1er ronda | Samantha Stosur | Katie O'Brien | 6-4, 6-3 | | match details | Eastbourne | Césped |
| 11.06.08 | 2da ronda | Yaroslava Shvedova | Katie O'Brien | 7-5, 1-6, 7-5 | | match details | Birmingham | Césped |
| 09.06.08 | 1er ronda | Katie O'Brien | Alla Kudryavtseva | 6-0, 3-6, 7-62 | | match details | ||
| 02.06.08 | 1er ronda | Katie O'Brien | Vania King | 3-6, 6-1, 6-3 | | match details | Surbiton | Césped |
| 02.06.08 | 2da ronda | Carly Gullickson | Katie O'Brien | 6-3, 6-3 | | match details | ||
| 22.05.08 | c 2 | Kristina Barrois | Katie O'Brien | 6-4, 6-2 | | match details | Paris | Arcilla |
| 20.05.08 | c 1 | Katie O'Brien | Melanie South | 7-5, 6-1 | | match details | ||
| 10.05.08 | c 1 | Iveta Benesova | Katie O'Brien | 6-4, 6-3 | | match details | Rome | Arcilla |
| 05.05.08 | 2da ronda | Mathilde Johansson | Katie O'Brien | 6-3, 6-3 | | match details |  Zagreb | Arcilla |
| 05.05.08 | 1er ronda | Katie O'Brien | Claudine Schaul | 6-4, 6-2 | | match details | ||
| 29.04.08 | 1er ronda | Emilie Loit | Katie O'Brien | 6-77, 6-4, 6-1 | | match details |  Fes | Arcilla |
| 14.04.08 | 1er ronda | Katie O'Brien | Maria-Jose Martinez Sanchez | 6-3, 6-4 | | match details | Malo | Arcilla |
| 14.04.08 | 1/4 | Stephanie Cohen-Aloro | Katie O'Brien | 6-0, 6-2 | | match details | ||
| 14.04.08 | 2da ronda | Katie O'Brien | Zuzana Ondraskova | 6-3, 7-5 | | match details | ||
| 07.04.08 | 1er ronda | Emmanuelle Gagliardi | Katie O'Brien | 6-1, 6-2 | | match details | Monzon | Difícil |
| 31.03.08 | 1er ronda | Naomi Cavaday | Katie O'Brien | 6-2, 6-1 | | match details |  Patra | Difícil |
| 24.03.08 | 1/4 | Tanja Ostertag | Katie O'Brien | 6-3, 6-4 | | match details | Jersey | I. difícil |
| 24.03.08 | 1er ronda | Katie O'Brien | Anna Smith | 6-1, 6-4 | | match details | ||
| 24.03.08 | 2da ronda | Katie O'Brien | Katharina Brown | 6-2, 6-2 | | match details | ||
| 11.03.08 | calif. | Barbora Strycova | Katie O'Brien | 6-4, 6-4 | | match details | Indian Wells | Difícil |
| 10.03.08 | c 1 | Katie O'Brien | Selima Sfar | 6-3, 7-66 | | match details | ||
| 04.03.08 | 1er ronda | Olga Savchuk | Katie O'Brien | 6-4, 2-6, 7-5 | | match details |  Bangalore | Difícil |
| 23.02.08 | c 1 | Eva Hrdinova | Katie O'Brien | 7-65, 6-2 | | match details |  Dubai | Difícil |
| 16.02.08 | c 1 | Urszula Radwanska | Katie O'Brien | 6-3, 6-1 | | match details |  Doha | Difícil |
| 04.02.08 | 1er ronda | Katie O'Brien | Rika Fujiwara | 6-1, 6-4 | | match details | Midland | I. difícil |
| 04.02.08 | 2da ronda | Katie O'Brien | Audra Cohen | 2-6, 6-3, 6-2 | | match details | ||
| 04.02.08 | 1/4 | Laura Granville | Katie O'Brien | 1-6, 6-3, 6-1 | | match details | ||
| 02.02.08 | Katie O'Brien | Magali De Lattre | 6-4, 6-2 | | match details |  Fed Cup | Alfombra | |
| 01.02.08 | Caroline Wozniacki | Katie O'Brien | 6-2, 1-6, 6-2 | | match details | |||
| 31.01.08 | Agnes Szavay | Katie O'Brien | 6-1, 6-2 | | match details | |||
| 30.01.08 | Patty Schnyder | Katie O'Brien | 7-65, 7-5 | | match details | |||
| 12.01.08 | calif. | Meng Yuan | Katie O'Brien | 6-4, 6-2 | | match details |  Melbourne | Difícil |
| 11.01.08 | c 2 | Katie O'Brien | Yanina Wickmayer | 4-6, 6-3, 8-6 | | match details | ||
| 10.01.08 | c 1 | Katie O'Brien | Darya Kustova | 6-3, 1-0, Darya Kustova - retirado | | match details |