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 2009
Katie O'Brien / año 2009
| 02.11.09 | 2da ronda | Mariya Koryttseva | Katie O'Brien | 6-4, 6-4 |  | match details |  Ismaning | Alfombra |
| 02.11.09 | 1er ronda | Katie O'Brien | Nikola Hofmanova | 6-3, 6-3 |  | match details | ||
| 28.10.09 | 1er ronda | Severine Beltrame | Katie O'Brien | 6-1, 6-3 | | match details |  Poitiers | I. difícil |
| 15.10.09 | 2da ronda | Caroline Wozniacki | Katie O'Brien | 6-0, 6-1 | | match details |  Osaka | Difícil |
| 11.10.09 | 1er ronda | Katie O'Brien | Alexa Glatch | 6-3, 6-4 | | match details | ||
| 05.10.09 | 1/2 | Olga Savchuk | Katie O'Brien | 3-6, 6-4, 7-64 | | match details | Tokyo | Difícil |
| 05.10.09 | 1er ronda | Katie O'Brien | Aki Yamasoto | 6-1, 6-2 | | match details | ||
| 05.10.09 | 2da ronda | Katie O'Brien | Ling Zhang | 6-2, 6-4 | | match details | ||
| 05.10.09 | 1/4 | Katie O'Brien | Misaki Doi | 6-1, 3-6, 6-3 | | match details | ||
| 21.09.09 | 2da ronda | Katie O'Brien | Nicola Geuer | 6-2, 6-4 | | match details |  Shrewsbury | I. difícil |
| 21.09.09 | 1/4 | Katie O'Brien | Angelique Kerber | 3-6, 6-3, 7-65 | | match details | ||
| 21.09.09 | 1/2 | Katie O'Brien | Mona Barthel | 6-4, 6-2 | | match details | ||
| 21.09.09 | 1er ronda | Katie O'Brien | Johanna Larsson | 6-1, 6-3 | | match details | ||
| 21.09.09 | fin | Elena Baltacha | Katie O'Brien | 6-3, 4-6, 6-3 | | match details | ||
| 14.09.09 | 1er ronda | Alla Kudryavtseva | Katie O'Brien | 6-1, 6-4 | | match details |  Quebec City | I. difícil |
| 27.08.09 | c 2 | Anna Tatishvili | Katie O'Brien | 6-2, 6-4 | | match details |  New York | Difícil |
| 25.08.09 | c 1 | Katie O'Brien | Nikola Hofmanova | 6-3, 6-2 | | match details | ||
| 27.07.09 | 1/2 | Katie O'Brien | Justine Ozga | 6-4, 6-4 | | match details |  Vigo | Difícil |
| 27.07.09 | 1er ronda | Katie O'Brien | Amanda Carreras | 6-0, 6-0 | | match details | ||
| 27.07.09 | 2da ronda | Katie O'Brien | Nuria Parrizas-Diaz | 6-0, 7-66 | | match details | ||
| 27.07.09 | 1/4 | Katie O'Brien | Rebeca Bou-Nogueiro | 6-1, 6-3 | | match details | ||
| 27.07.09 | fin | Georgie Gent | Katie O'Brien | 7-5, 6-2 | | match details | ||
| 20.07.09 | 1er ronda | Lucie Safarova | Katie O'Brien | 6-4, 6-4 | | match details |  Portoroz | Difícil |
| 14.07.09 | 1er ronda | Monica Niculescu | Katie O'Brien | 6-3, 6-2 | | match details |  Prague | Arcilla |
| 06.07.09 | 1er ronda | Katie O'Brien | Oksana Kalashnikova | 6-2, 4-6, 6-3 | | match details |  Zagreb | Arcilla |
| 06.07.09 | 2da ronda | Renata Voracova | Katie O'Brien | 1-6, 6-4, 6-1 | | match details | ||
| 23.06.09 | 1er ronda | Iveta Benesova | Katie O'Brien | 6-2, 5-7, 6-4 | | match details | London | Césped |
| 14.06.09 | c 2 | Ekaterina Makarova | Katie O'Brien | 6-4, 6-2 | | match details | Eastbourne | Césped |
| 13.06.09 | c 1 | Katie O'Brien | Naomi Broady | 7-5, 4-6, 6-4 | | match details | ||
| 08.06.09 | 1er ronda | Melanie South | Katie O'Brien | 6-4, 1-6, 7-65 | | match details | Birmingham | Césped |
| 01.06.09 | 1er ronda | Katie O'Brien | Svenja Weidemann | 6-4, 7-61 | | match details | Nottingham | Césped |
| 01.06.09 | 2da ronda | Naomi Cavaday | Katie O'Brien | 6-2, 6-3 | | match details | ||
| 25.05.09 | 1er ronda | Olga Govortsova | Katie O'Brien | 6-1, 6-1 | | match details | Paris | Arcilla |
| 22.05.09 | calif. | Arantxa Rus | Katie O'Brien | 6-4, 7-66 | | match details | ||
| 21.05.09 | c 2 | Katie O'Brien | Rika Fujiwara | 7-63, 6-2 | | match details | ||
| 20.05.09 | c 1 | Katie O'Brien | Karla Mraz | 6-1, 6-75, 6-2 | | match details | ||
| 27.04.09 | 1/4 | Katie O'Brien | Marinne Giraud | 6-3, 6-2 | | match details |  Johannesburg | Difícil |
| 27.04.09 | 1er ronda | Katie O'Brien | Chanel Simmonds | 6-1, 6-1 | | match details | ||
| 27.04.09 | 1/2 | Eva Hrdinova | Katie O'Brien | 6-4, 6-2 | | match details | ||
| 27.04.09 | 2da ronda | Katie O'Brien | Megan Moulton-Levy | 6-3, 6-3 | | match details | ||
| 14.04.09 | 1er ronda | Stephanie Dubois | Katie O'Brien | 4-6, 6-2, 6-1 | | match details | Charleston | Arcilla |
| 09.04.09 | 1/4 | Aravane Rezai | Katie O'Brien | 6-4, 3-6, 6-2 | | match details |  Torhout | I. difícil |
| 08.04.09 | 2da ronda | Katie O'Brien | Sofia Arvidsson | 6-710, 7-5, 6-2 | | match details | ||
| 07.04.09 | 1er ronda | Katie O'Brien | Claire Feuerstein | 6-3, 6-4 | | match details | ||
| 23.03.09 | 1/4 | Katie O'Brien | Monique Adamczak | 6-3, 6-3 | | match details | Jersey | I. difícil |
| 23.03.09 | 1/2 | Katie O'Brien | Stephanie Foretz | 2-6, 6-2, 6-1 | | match details | ||
| 23.03.09 | 1er ronda | Katie O'Brien | Stefania Boffa | 7-62, 6-3 | | match details | ||
| 23.03.09 | fin | Katie O'Brien | Claire Feuerstein | 7-5, 1-0, Claire Feuerstein - retirado | | match details | ||
| 23.03.09 | 2da ronda | Katie O'Brien | Heather Watson | 6-1, 6-1 | | match details | ||
| 02.03.09 | 1/2 | Katie O'Brien | Vitalia Diatchenko | 7-5, 6-3 | | match details |  Minsk | Alfombra |
| 02.03.09 | 1er ronda | Katie O'Brien | Avgusta Tsybysheva | 6-0, 6-2 | | match details | ||
| 02.03.09 | 2da ronda | Katie O'Brien | Alexandra Dulgheru | 6-4, 6-2 | | match details | ||
| 02.03.09 | fin | Darya Kustova | Katie O'Brien | 6-73, 6-1, 6-4 | | match details | ||
| 02.03.09 | 1/4 | Katie O'Brien | Ima Bohush | 6-1, 6-2 | | match details | ||
| 23.02.09 | 1er ronda | Katie O'Brien | Oxana Lyubtsova | 6-4, 6-75, 7-5 | | match details | Biberach | I. difícil |
| 23.02.09 | 1/2 | Karolina Sprem | Katie O'Brien | 6-2, 6-3 | | match details | ||
| 23.02.09 | 2da ronda | Katie O'Brien | Tatjana Maria | 6-3, 6-0 | | match details | ||
| 23.02.09 | 1/4 | Katie O'Brien | Kristina Barrois | 7-67, 6-3 | | match details | ||
| 09.02.09 | 1/2 | Eleni Daniilidou | Katie O'Brien | 1-6, 7-64, 6-2 | | match details | Midland | I. difícil |
| 09.02.09 | 1er ronda | Katie O'Brien | Michaela Pastikova | 6-0, 6-2 | | match details | ||
| 09.02.09 | 2da ronda | Katie O'Brien | Chanelle Scheepers | 6-1, 7-5 | | match details | ||
| 09.02.09 | 1/4 | Katie O'Brien | Irina-Camelia Begu | 6-4, 6-3 | | match details | ||
| 02.02.09 | fin | Katie O'Brien | Johanna Konta | 3-6, 6-2, 6-4 | | match details | Sutton | I. difícil |
| 02.02.09 | 2da ronda | Katie O'Brien | Teodora Mircic | 6-1, 6-1 | | match details | ||
| 02.02.09 | 1/4 | Katie O'Brien | Naomi Cavaday | 6-1, 6-1 | | match details | ||
| 02.02.09 | 1/2 | Katie O'Brien | Renata Voracova | 6-3, 6-2 | | match details | ||
| 02.02.09 | 1er ronda | Katie O'Brien | Jade Curtis | 6-2, 6-4 | | match details | ||
| 19.01.09 | 1er ronda | Monica Niculescu | Katie O'Brien | 6-4, 6-4 | | match details |  Melbourne | Difícil |
| 17.01.09 | calif. | Katie O'Brien | Betina Jozami | 6-0, 7-62 | | match details | ||
| 16.01.09 | c 2 | Katie O'Brien | Julie Ditty | 3-6, 6-3, 6-3 | | match details | ||
| 15.01.09 | c 1 | Katie O'Brien | Sandra Zahlavova | 7-5, 6-3 | | match details | ||
| 03.01.09 | c 1 | Ayumi Morita | Katie O'Brien | 6-3, 2-6, 7-5 | | match details |  Auckland | Difícil |