H2H data updated: 2026-09-13 00:00 UTC
Caroline Wozniacki holds a 1–0 lead over Katie Obrien in their WTA head-to-head. Across 1 main-draw meeting, Caroline Wozniacki leads 1–0 on hard courts. Most recently, Caroline Wozniacki won the 2009 Japan Women's Open second round 6-0 6-1.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Caroline Wozniacki | 6-0 6-1 | Katie Obrien | Match data | Oct 16, 2009* | R16 | Japan Women's Open | International → modern equivalent WTA 250 | Hard |
Estimated match date where the exact historical date is unavailable. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 including documented historical predecessor categories | Finals | 500 including documented historical predecessor categories | 250 including documented historical predecessor categories | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Caroline Wozniacki | #289 | #1 | 10,255 | 2,154 | 620 | 275 | 69.3% | 1 | 6 | 1 | 11 | 11 | 30 |
| Katie Obrien | #782 | #84 | 769 | 1,514 | 9 | 34 | 20.9% | 0 | 0 | 0 | 0 | 0 | 0 |
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Caroline Wozniacki | Katie Obrien | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 2005 | 0–2 | 0.0% | — | 1,482 | 0 | 0 | 2004 | 0–1 | 0.0% | #387 | 1,492 | 0 | 0 |
| 2006 | 4–4 | 50.0% | #231 | 1,527 | 0 | 0 | 2005 | 0–1 | 0.0% | #267 | 1,492 | 0 | 0 |
| 2007 | 12–15 | 44.4% | #60 | 1,555 | 0 | 0 | 2006 | 0–3 | 0.0% | #187 | 1,461 | 0 | 0 |
| 2008 | 53–20 | 72.6% | #12 | 1,913 | 0 | 3 | 2007 | 4–3 | 57.1% | #127 | 1,501 | 0 | 0 |
| 2009 | 66–25 | 72.5% | #4 | 1,898 | 0 | 6 | 2008 | 2–8 | 20.0% | #159 | 1,450 | 0 | 0 |
| 2010 | 63–17 | 78.8% | #1 | 2,105 | 0 | 12 | 2009 | 1–9 | 10.0% | #88 | 1,390 | 0 | 0 |
| 2011 | 63–17 | 78.8% | #1 | 1,988 | 0 | 18 | 2010 | 2–8 | 20.0% | #179 | 1,370 | 0 | 0 |
| 2012 | 50–21 | 70.4% | #10 | 1,975 | 0 | 20 | 2011 | 0–1 | 0.0% | #357 | 1,365 | 0 | 0 |
| 2013 | 41–22 | 65.1% | #10 | 1,906 | 0 | 21 | — | — | — | — | — | — | — |
| 2014 | 49–19 | 72.1% | #8 | 2,014 | 0 | 22 | — | — | — | — | — | — | — |
| 2015 | 39–23 | 62.9% | #17 | 1,817 | 0 | 23 | — | — | — | — | — | — | — |
| 2016 | 34–18 | 65.4% | #19 | 1,912 | 0 | 25 | — | — | — | — | — | — | — |
| 2017 | 60–22 | 73.2% | #3 | 2,004 | 0 | 27 | — | — | — | — | — | — | — |
| 2018 | 41–17 | 70.7% | #3 | 1,947 | 1 | 30 | — | — | — | — | — | — | — |
| 2019 | 20–15 | 57.1% | #38 | 1,845 | 1 | 30 | — | — | — | — | — | — | — |
| 2020 | 5–2 | 71.4% | #36 | 1,852 | 1 | 30 | — | — | — | — | — | — | — |
| 2023 | 4–3 | 57.1% | #249 | 1,862 | 1 | 30 | — | — | — | — | — | — | — |
| 2024 | 16–13 | 55.2% | #70 | 1,845 | 1 | 30 | — | — | — | — | — | — | — |
Rows are aligned in career order because complete birth data is unavailable. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.
| Caroline Wozniacki | Katie Obrien | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Yr | Hard | Clay | Grass | ||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | ||
| 2005 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | 2004 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 2006 | 4 | 4 | 8 | 50.0% | — | — | — | — | — | — | — | — | 2005 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 2007 | 8 | 10 | 18 | 44.4% | 3 | 4 | 7 | 42.9% | 1 | 1 | 2 | 50.0% | 2006 | — | — | — | — | — | — | — | — | 0 | 3 | 3 | 0.0% |
| 2008 | 42 | 13 | 55 | 76.4% | 7 | 5 | 12 | 58.3% | 4 | 2 | 6 | 66.7% | 2007 | 2 | 1 | 3 | 66.7% | — | — | — | — | 2 | 2 | 4 | 50.0% |
| 2009 | 35 | 18 | 53 | 66.0% | 23 | 6 | 29 | 79.3% | 8 | 1 | 9 | 88.9% | 2008 | 1 | 3 | 4 | 25.0% | 0 | 2 | 2 | 0.0% | 1 | 3 | 4 | 25.0% |
| 2010 | 45 | 9 | 54 | 83.3% | 15 | 6 | 21 | 71.4% | 3 | 2 | 5 | 60.0% | 2009 | 1 | 4 | 5 | 20.0% | 0 | 3 | 3 | 0.0% | 0 | 2 | 2 | 0.0% |
| 2011 | 40 | 11 | 51 | 78.4% | 20 | 5 | 25 | 80.0% | 3 | 1 | 4 | 75.0% | 2010 | 1 | 4 | 5 | 20.0% | 1 | 2 | 3 | 33.3% | 0 | 2 | 2 | 0.0% |
| 2012 | 42 | 14 | 56 | 75.0% | 5 | 4 | 9 | 55.6% | 3 | 3 | 6 | 50.0% | 2011 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 2013 | 34 | 14 | 48 | 70.8% | 3 | 6 | 9 | 33.3% | 4 | 2 | 6 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2014 | 42 | 15 | 57 | 73.7% | 1 | 2 | 3 | 33.3% | 6 | 2 | 8 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2015 | 26 | 17 | 43 | 60.5% | 7 | 4 | 11 | 63.6% | 6 | 2 | 8 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2016 | 31 | 14 | 45 | 68.9% | — | — | — | — | 3 | 4 | 7 | 42.9% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2017 | 41 | 14 | 55 | 74.5% | 12 | 6 | 18 | 66.7% | 7 | 2 | 9 | 77.8% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2018 | 26 | 12 | 38 | 68.4% | 9 | 4 | 13 | 69.2% | 6 | 1 | 7 | 85.7% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2019 | 12 | 9 | 21 | 57.1% | 4 | 4 | 8 | 50.0% | 4 | 2 | 6 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2020 | 5 | 2 | 7 | 71.4% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2023 | 4 | 3 | 7 | 57.1% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2024 | 10 | 7 | 17 | 58.8% | 2 | 3 | 5 | 40.0% | 4 | 3 | 7 | 57.1% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 447 | 188 | 635 | 70.4% | 111 | 59 | 170 | 65.3% | 62 | 28 | 90 | 68.9% | Career | 5 | 12 | 17 | 29.4% | 1 | 7 | 8 | 12.5% | 3 | 15 | 18 | 16.7% |
Rows are aligned in career order because complete birth data is unavailable. Detailed serve and return statistics available for 788/893 of Caroline Wozniacki's and 31/42 of Katie Obrien's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.
| Caroline Wozniacki | Katie Obrien | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% |
| 2006 | 3/8 | 2.7 | 2.3 | 65.7% | 58.9% | 51.0% | 43.9% | 42.3% | 56.6% | 49.3% | 2005 | 1/1 | 0.0 | 4.0 | 51.2% | 63.6% | 47.6% | 0.0% | — | 55.8% | 20.0% |
| 2007 | 18/27 | 1.1 | 3.2 | 67.3% | 56.6% | 40.0% | 54.4% | 45.4% | 51.4% | 41.8% | 2006 | 2/3 | 1.5 | 6.0 | 58.1% | 57.7% | 42.1% | 37.9% | 62.5% | 51.1% | 42.8% |
| 2008 | 63/73 | 2.1 | 2.1 | 65.9% | 65.6% | 50.8% | 58.8% | 54.4% | 60.4% | 49.1% | 2007 | 4/7 | 2.3 | 5.3 | 55.7% | 62.5% | 36.7% | 44.9% | 36.4% | 51.4% | 42.2% |
| 2009 | 86/91 | 2.0 | 1.7 | 68.9% | 64.2% | 50.0% | 52.2% | 49.6% | 59.7% | 48.6% | 2008 | 6/10 | 1.5 | 6.7 | 54.5% | 62.6% | 43.3% | 54.5% | 42.0% | 53.7% | 42.6% |
| 2010 | 71/80 | 1.8 | 1.9 | 68.9% | 65.3% | 50.2% | 59.5% | 50.1% | 60.6% | 48.1% | 2009 | 9/10 | 1.2 | 6.6 | 59.0% | 54.7% | 35.8% | 45.2% | 44.2% | 46.9% | 39.4% |
| 2011 | 73/80 | 1.6 | 1.6 | 70.6% | 65.6% | 51.4% | 58.1% | 53.0% | 61.5% | 51.1% | 2010 | 8/10 | 1.6 | 6.3 | 59.5% | 54.8% | 39.7% | 41.7% | 33.7% | 49.0% | 37.8% |
| 2012 | 60/71 | 1.8 | 1.6 | 66.8% | 63.6% | 51.4% | 59.5% | 52.9% | 59.4% | 47.5% | 2011 | 1/1 | 2.0 | 5.0 | 62.9% | 46.2% | 30.4% | 41.7% | 60.0% | 40.3% | 37.5% |
| 2013 | 56/63 | 1.5 | 1.8 | 69.1% | 62.5% | 50.3% | 59.3% | 54.1% | 58.9% | 47.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2014 | 61/68 | 2.3 | 2.6 | 69.6% | 66.0% | 48.0% | 58.7% | 53.3% | 60.4% | 48.1% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2015 | 51/62 | 2.0 | 1.9 | 69.9% | 65.3% | 52.6% | 50.4% | 51.3% | 61.5% | 46.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2016 | 44/52 | 2.1 | 2.1 | 67.7% | 66.5% | 46.3% | 57.0% | 56.3% | 59.9% | 47.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2017 | 76/82 | 2.6 | 2.2 | 67.6% | 65.7% | 49.4% | 56.8% | 51.6% | 60.2% | 47.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2018 | 50/58 | 3.0 | 2.5 | 64.9% | 68.0% | 48.4% | 52.5% | 54.9% | 61.2% | 48.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2019 | 35/35 | 2.8 | 1.8 | 65.3% | 63.2% | 50.1% | 51.6% | 50.7% | 58.5% | 44.4% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2020 | 7/7 | 3.1 | 1.3 | 70.4% | 68.7% | 54.5% | 63.1% | 43.8% | 64.8% | 49.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2023 | 7/7 | 2.1 | 3.0 | 61.5% | 67.5% | 47.4% | 57.7% | 36.6% | 59.6% | 44.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 2024 | 27/29 | 1.8 | 2.6 | 64.3% | 65.3% | 47.6% | 55.5% | 55.0% | 59.1% | 46.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | 788/895 | 2.1 | 2.0 | 67.9% | 65.0% | 49.7% | 56.4% | 52.2% | 60.0% | 47.9% | Career | 31/43 | 1.5 | 6.2 | 57.6% | 57.5% | 39.0% | 44.0% | 40.3% | 49.7% | 39.5% |
Rows are aligned in career order because complete birth data is unavailable. Metrics use eligible main-draw results; point statistics use matches with detailed data. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.
| Caroline Wozniacki | Katie Obrien | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule |
| 2005 | 1482 | 101.4 | — | — | — | — | — | — | — | 0.0% | -3.75 | — | 0–1 | — | -0.25 | 2004 | 1492 | 98.4 | — | — | — | — | — | — | — | 0.0% | -2.00 | — | — | — | -0.06 |
| 2006 | 1527 | 119.1 | +0.53 | +0.91 | 1.137 | 52.5% | +17 | — | — | 47.1% | -0.12 | 1–0 | — | — | -0.46 | 2005 | 1492 | 103.3 | +4.63 | +2.47 | 0.453 | 37.5% | — | — | — | 0.0% | -3.50 | — | — | — | -0.29 |
| 2007 | 1556 | 117.2 | -2.81 | -1.82 | 0.860 | 46.7% | +15 | -35 | — | 46.0% | -0.59 | 4–5 (44%) | 7–1 (88%) | 103.2 | +0.40 | 2006 | 1462 | 94.0 | -0.38 | +0.43 | 0.876 | 47.0% | — | — | +15 | 25.0% | -1.50 | 0–2 | 0–1 | — | +0.02 |
| 2008 | 1914 | 154.8 | +4.79 | +4.70 | 1.241 | 54.7% | -5 | -303 | -228 | 69.9% | +1.69 | 9–5 (64%) | 6–8 (43%) | 104.7 | -0.96 | 2007 | 1502 | 98.4 | -1.08 | -1.93 | 0.868 | 46.8% | +35 | — | +18 | 53.3% | -0.33 | 1–0 | 1–0 | — | +0.89 |
| 2009 | 1899 | 153.9 | +3.97 | +4.82 | 1.208 | 54.1% | -27 | -24 | -64 | 69.4% | +1.47 | 15–8 (65%) | 11–7 (61%) | 106.6 | -0.77 | 2008 | 1451 | 98.3 | -1.41 | -1.77 | 0.920 | 48.4% | +67 | — | +20 | 30.8% | -1.19 | 2–4 (33%) | 3–0 (100%) | — | +0.44 |
| 2010 | 2105 | 166.0 | +4.94 | +4.76 | 1.219 | 54.3% | +27 | -204 | -284 | 72.4% | +1.70 | 18–4 (82%) | 8–2 (80%) | 113.4 | +1.46 | 2009 | 1391 | 89.7 | -5.01 | -2.96 | 0.742 | 43.3% | +96 | +66 | — | 21.7% | -2.04 | 0–3 (0%) | 0–1 | — | +0.39 |
| 2011 | 1988 | 162.1 | +5.76 | +7.01 | 1.328 | 56.0% | +52 | -9 | -153 | 74.7% | +1.90 | 11–7 (61%) | 10–5 (67%) | 101.2 | +1.97 | 2010 | 1371 | 97.5 | -2.84 | -3.79 | 0.741 | 43.8% | +103 | +65 | — | 29.2% | -1.67 | 1–3 (25%) | 1–0 | — | +0.42 |
| 2012 | 1976 | 156.2 | +3.80 | +4.12 | 1.171 | 53.6% | +42 | -42 | -144 | 66.9% | +1.29 | 15–9 (63%) | 11–8 (58%) | 100.8 | +0.75 | 2011 | 1366 | 99.1 | -2.49 | -4.08 | 0.628 | 39.1% | — | — | — | 0.0% | -4.00 | — | — | — | -0.01 |
| 2013 | 1906 | 152.3 | +3.39 | +3.53 | 1.156 | 53.3% | +82 | -137 | -61 | 61.0% | +1.06 | 9–9 (50%) | 6–9 (40%) | 92.0 | +3.21 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2014 | 2014 | 163.0 | +4.24 | +5.25 | 1.216 | 54.2% | +24 | -280 | -133 | 64.9% | +1.45 | 16–6 (73%) | 5–10 (33%) | 100.3 | -0.30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2015 | 1818 | 153.2 | +3.21 | +4.72 | 1.211 | 54.0% | +6 | -9 | +74 | 62.6% | +1.23 | 9–6 (60%) | 8–7 (53%) | 101.2 | -0.90 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2016 | 1912 | 146.8 | +3.41 | +3.91 | 1.191 | 53.8% | +27 | — | -117 | 65.2% | +1.25 | 8–7 (53%) | 3–5 (38%) | 96.7 | -0.32 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2017 | 2004 | 161.0 | +3.91 | +4.92 | 1.202 | 54.0% | +52 | -146 | -103 | 68.5% | +1.56 | 17–8 (68%) | 5–6 (45%) | 103.2 | +0.13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2018 | 1947 | 156.8 | +4.39 | +5.24 | 1.245 | 54.7% | +6 | -64 | +24 | 67.7% | +1.47 | 12–6 (67%) | 6–7 (46%) | 101.2 | +0.11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2019 | 1845 | 144.8 | +1.89 | +0.99 | 1.069 | 51.3% | +47 | -6 | +118 | 60.8% | +0.70 | 3–7 (30%) | 5–2 (71%) | 96.0 | +0.87 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2020 | 1853 | 131.5 | +2.36 | +2.51 | 1.397 | 56.9% | +35 | — | — | 70.6% | +1.71 | 1–2 (33%) | — | — | +0.18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2023 | 1863 | 134.9 | +2.02 | +2.05 | 1.110 | 51.8% | +58 | — | — | 56.3% | +0.56 | 1–1 | 1–0 | — | -0.17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2024 | 1845 | 140.8 | +1.93 | +2.73 | 1.145 | 53.0% | +44 | -42 | +224 | 58.1% | +0.77 | 4–6 (40%) | 2–1 (67%) | 96.6 | +0.15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 2154 | 160.9 | +3.83 | +4.42 | 1.199 | 53.9% | +28 | -90 | -57 | 66.3% | +1.33 | 153–96 (61%) | 94–79 (54%) | 104.3 | +0.57 | Career | 1514 | 93.8 | -2.56 | -2.45 | 0.785 | 44.8% | +80 | +66 | +18 | 29.4% | -1.51 | 4–12 (25%) | 5–2 (71%) | 95.3 | +4.19 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Agnieszka Radwanska | 11 | 6 | 17 | Aug 11, 2017 | H2H |
| Angelique Kerber | 8 | 8 | 16 | Mar 13, 2024 | H2H |
| Petra Kvitova | 7 | 8 | 15 | Aug 31, 2023 | H2H |
| Dominika Cibulkova | 10 | 4 | 14 | Sep 23, 2017 | H2H |
| Svetlana Kuznetsova | 8 | 6 | 14 | Jun 6, 2017 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Alla Kudryavtseva | 1 | 1 | 2 | Sep 17, 2009 | H2H |
| Monica Niculescu | 0 | 2 | 2 | Jul 16, 2009 | H2H |
| Olga Govortsova | 0 | 2 | 2 | May 26, 2009 | H2H |
| Kimiko Date | 0 | 1 | 1 | Jun 22, 2011 | H2H |
| Ekaterina Ivanova | 0 | 1 | 1 | Sep 23, 2010 | H2H |