O’Brien - Sema
09.05.2007, Fukuoka ITF, round of 16, grass
| O’Brien Katie | 2 : 1 (6-0, 4-6, 7-68) |
Sema Erika | ||
|---|---|---|---|---|
![]() |
-. | Singles ranking | 558. | ![]() |
| 2. 5. 1986 | Birthdate | 24. 11. 1988 | ||
| 167 cm | Height | - | ||
| - | Weight | - | ||
| right | Plays | right | ||
| - | Turned pro | - | ||
| Surface | O’Brien Katie | Sema Erika |
|---|---|---|
| Indoors | - | 5/3 |
| Clay | - | - |
| Grass | - | - |
| Hard | - | 11/12 |
| Not set | - | - |
| Year | Summary | Clay | Hard | Indoors | Grass | Not set |
|---|---|---|---|---|---|---|
| Summary: | 301/241 | 20/27 | 122/108 | 119/60 | 38/41 | 2/5 |
| 2011 | 13/17 | - | 5/5 | 2/5 | 6/7 | - |
| 2010 | 18/31 | 1/3 | 13/19 | 2/3 | 1/4 | 1/2 |
| 2009 | 47/25 | 3/5 | 15/8 | 27/8 | 2/4 | - |
| 2008 | 29/37 | 5/7 | 11/16 | 10/7 | 2/4 | 1/3 |
| 2007 | 43/32 | 0/3 | 18/17 | 16/7 | 9/5 | - |
| 2006 | 48/32 | 2/2 | 27/18 | 14/6 | 5/6 | - |
| 2005 | 44/29 | 1/1 | 19/13 | 17/8 | 7/7 | - |
| 2004 | 37/22 | 4/4 | 14/8 | 17/8 | 2/2 | - |
| 2003 | 11/11 | 4/2 | 0/3 | 3/4 | 4/2 | - |
| 2002 | 11/5 | - | 0/1 | 11/4 | - | - |
| Year | Summary | Clay | Hard | Indoors | Grass | Not set |
|---|---|---|---|---|---|---|
| Summary: | 583/503 | 52/53 | 446/367 | 51/50 | 34/33 | - |
| 2026 | 16/15 | - | 11/12 | 5/3 | - | - |
| 2025 | 28/26 | - | 23/24 | 5/2 | - | - |
| 2024 | 30/26 | 4/4 | 26/22 | - | - | - |
| 2023 | 37/28 | 2/2 | 34/23 | 0/1 | 1/2 | - |
| 2022 | 32/25 | 4/2 | 28/20 | 0/3 | - | - |
| 2021 | 31/23 | 13/7 | 18/16 | - | - | - |
| 2020 | 6/4 | - | 6/4 | - | - | - |
| 2019 | 24/28 | 1/1 | 21/25 | 2/2 | - | - |
| 2018 | 19/27 | 0/1 | 19/26 | - | - | - |
| 2017 | 40/30 | - | 39/29 | 1/1 | - | - |
| 2016 | 22/28 | 1/2 | 19/22 | 1/1 | 1/3 | - |
| 2015 | 30/26 | 1/2 | 27/21 | 0/1 | 2/2 | - |
| 2014 | 17/25 | 1/3 | 13/14 | 1/3 | 2/5 | - |
| 2013 | 30/24 | 2/2 | 25/19 | - | 3/3 | - |
| 2012 | 23/31 | 2/6 | 15/18 | 4/4 | 2/3 | - |
| 2011 | 43/28 | 6/8 | 28/15 | 4/2 | 5/3 | - |
| 2010 | 37/22 | 3/6 | 27/11 | 4/2 | 3/3 | - |
| 2009 | 47/26 | 6/3 | 29/14 | 10/8 | 2/1 | - |
| 2008 | 7/13 | 0/1 | 3/8 | 2/3 | 2/1 | - |
| 2007 | 39/20 | - | 26/13 | 6/4 | 7/3 | - |
| 2006 | 13/15 | 2/1 | 5/6 | 5/5 | 1/3 | - |
| 2005 | 8/8 | 4/1 | 1/4 | 0/2 | 3/1 | - |
| 2004 | 4/4 | - | 3/1 | 1/3 | - | - |
| 2003 | 0/1 | 0/1 | - | - | - | - |
Head-to-head: 1 - 0
| Year | Tournament | Match | S | Surface | 1 | 2 | 3 | 4 | 5 | Round |
|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | Fukuoka ITF | O’Brien | 2 | 6 | 4 | 7 | R16 | |||
| Sema | 1 | 0 | 6 | 68 |
Betting odds
Latest matches
- O’Brien
| Wimbledon, 1R, 20.06.2011 | ||
| Date - O’Brien | 2:0 | |
| Eastbourne, Q-1R, 11.06.2011 | ||
| Riske - O’Brien | 2:0 | |
| Nottingham 3 ITF, 1R, 08.06.2011 | ||
| Voracova - O’Brien | 2:1 | |
| Nottingham ITF, R16, 01.06.2011 | ||
| Oprandi - O’Brien | 2:1 | |
| Nottingham ITF, 1R, 31.05.2011 | ||
| O’Brien - Voegele | 2:0 | |
| Kurume ITF, 1R, 10.05.2011 | ||
| Fujiwara - O’Brien | 2:1 | |
| Fukuoka ITF, R16, 05.05.2011 | ||
| Takao - O’Brien | 2:0 | |
| Fukuoka ITF, 1R, 04.05.2011 | ||
| O’Brien - Lee | 2:0 | |
| Gifu ITF, QF, 29.04.2011 | ||
| Ishizu - O’Brien | 2:0 | |
| Gifu ITF, R16, 28.04.2011 | ||
| O’Brien - Fuda | 2:1 | |
- Sema
| Wuning 4 ITF, Q-1R, 07.06.2026 | ||
| Laskevich - Sema | 2:0 | |
| Wuning 3 ITF, 1R, 03.06.2026 | ||
| Yamaguchi - Sema | 2:0 | |
| Wuning 3 ITF, Q-R16, 01.06.2026 | ||
| Sema - Ren | 2:0 | |
| Wuning 3 ITF, Q-1R, 31.05.2026 | ||
| Sema - Chen | 2:0 | |
| Takasaki ITF, 1R, 20.05.2026 | ||
| Koike - Sema | 2:1 | |
| Takasaki ITF, Q-R16, 19.05.2026 | ||
| Sato - Sema | 2:0 | |
| Takasaki ITF, Q-1R, 18.05.2026 | ||
| Sema - Kuwata | 2:0 | |
| Andong ITF, R16, 14.05.2026 | ||
| Goto - Sema | 2:0 | |
| Andong ITF, 1R, 13.05.2026 | ||
| Sema - Kim | 2:0 | |
| Nakhon Pathom 2 ITF, SF, 09.05.2026 | ||
| Cheapchandej - Sema | 2:0 | |
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