H2H data updated: 2026-09-13 00:00 UTC
Kiki Bertens holds a 1–0 lead over Kristie Ahn in their WTA head-to-head. Across 1 main-draw meeting, Kiki Bertens leads 1–0 on hard courts. Most recently, Kiki Bertens won the 2018 Sydney International first round 6-2 6-4.
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 |
|---|---|---|---|---|---|---|---|---|
| Kiki Bertens | 6-2 6-4 | Kristie Ahn | Match data | Jan 10, 2018* | R32 | Sydney International | Premier → modern equivalent WTA 500 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kiki Bertens | #25 | #4 | 5,430 | 2,004 | 216 | 172 | 55.7% | 0 | 2 | 0 | 3 | 6 | 11 |
| Kristie Ahn | #1,053 | #87 | 745 | 1,707 | 16 | 29 | 35.6% | 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.
| Age | Kiki Bertens | Kristie Ahn | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 16 | — | — | — | — | — | — | — | 2008 | 0–1 | 0.0% | #451 | 1,498 | 0 | 0 |
| 19 | 2011 | 0–1 | 0.0% | #182 | 1,493 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 2012 | 11–12 | 47.8% | #63 | 1,580 | 0 | 1 | — | — | — | — | — | — | — |
| 21 | 2013 | 14–19 | 42.4% | #87 | 1,551 | 0 | 1 | — | — | — | — | — | — | — |
| 22 | 2014 | 11–14 | 44.0% | #68 | 1,579 | 0 | 1 | 2014 | 0–1 | 0.0% | #637 | 1,492 | 0 | 0 |
| 23 | 2015 | 7–17 | 29.2% | #104 | 1,520 | 0 | 1 | — | — | — | — | — | — | — |
| 24 | 2016 | 26–20 | 56.5% | #22 | 1,689 | 0 | 2 | — | — | — | — | — | — | — |
| 25 | 2017 | 30–26 | 53.6% | #31 | 1,696 | 0 | 5 | 2017 | 4–5 | 44.4% | #112 | 1,533 | 0 | 0 |
| 26 | 2018 | 46–23 | 66.7% | #9 | 1,911 | 0 | 8 | 2018 | 1–6 | 14.3% | #200 | 1,585 | 0 | 0 |
| 27 | 2019 | 57–26 | 68.7% | #9 | 1,897 | 0 | 10 | 2019 | 9–7 | 56.2% | #94 | 1,659 | 0 | 0 |
| 28 | 2020 | 13–6 | 68.4% | #9 | 1,882 | 0 | 11 | 2020 | 0–5 | 0.0% | #108 | 1,630 | 0 | 0 |
| 29 | 2021 | 1–8 | 11.1% | #25 | 1,733 | 0 | 11 | 2021 | 2–4 | 33.3% | #259 | 1,540 | 0 | 0 |
Seasons are aligned by the age each player spent most of that calendar year. 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.
| Age | Kiki Bertens | Kristie Ahn | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | |||||||||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | |||
| 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2008 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2011 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2012 | 5 | 7 | 12 | 41.7% | 5 | 3 | 8 | 62.5% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2013 | 5 | 8 | 13 | 38.5% | 6 | 8 | 14 | 42.9% | 0 | 2 | 2 | 0.0% | 3 | 1 | 4 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2014 | 5 | 10 | 15 | 33.3% | 6 | 4 | 10 | 60.0% | — | — | — | — | — | — | — | — | 2014 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2015 | 3 | 12 | 15 | 20.0% | 1 | 3 | 4 | 25.0% | 3 | 2 | 5 | 60.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2016 | 7 | 14 | 21 | 33.3% | 17 | 5 | 22 | 77.3% | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2017 | 7 | 16 | 23 | 30.4% | 23 | 7 | 30 | 76.7% | 0 | 3 | 3 | 0.0% | — | — | — | — | 2017 | 2 | 4 | 6 | 33.3% | — | — | — | — | 2 | 1 | 3 | 66.7% | — | — | — | — |
| 26 | 2018 | 26 | 15 | 41 | 63.4% | 15 | 5 | 20 | 75.0% | 5 | 3 | 8 | 62.5% | — | — | — | — | 2018 | 0 | 4 | 4 | 0.0% | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 27 | 2019 | 30 | 18 | 48 | 62.5% | 18 | 5 | 23 | 78.3% | 9 | 3 | 12 | 75.0% | — | — | — | — | 2019 | 8 | 5 | 13 | 61.5% | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 28 | 2020 | 10 | 3 | 13 | 76.9% | 3 | 3 | 6 | 50.0% | — | — | — | — | — | — | — | — | 2020 | 0 | 4 | 4 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 29 | 2021 | 0 | 4 | 4 | 0.0% | 1 | 2 | 3 | 33.3% | 0 | 2 | 2 | 0.0% | — | — | — | — | 2021 | — | — | — | — | 0 | 2 | 2 | 0.0% | 2 | 2 | 4 | 50.0% | — | — | — | — |
| Career | — | 98 | 107 | 205 | 47.8% | 95 | 45 | 140 | 67.9% | 20 | 19 | 39 | 51.3% | 3 | 1 | 4 | 75.0% | — | 10 | 19 | 29 | 34.5% | 2 | 5 | 7 | 28.6% | 4 | 5 | 9 | 44.4% | — | — | — | — |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 361/388 of Kiki Bertens's and 44/45 of Kristie Ahn'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.
| Age | Kiki Bertens | Kristie Ahn | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 16 | — | —/— | — | — | — | — | — | — | — | — | — | 2008 | 1/1 | 1.0 | 1.0 | 70.6% | 66.7% | 33.3% | 40.0% | 11.1% | 56.9% | 34.2% |
| 19 | 2011 | 1/1 | 3.0 | 5.0 | 53.7% | 61.1% | 32.3% | 50.0% | 42.9% | 47.8% | 40.9% | — | —/— | — | — | — | — | — | — | — | — | — |
| 20 | 2012 | 23/23 | 2.9 | 4.1 | 60.5% | 65.3% | 41.1% | 49.3% | 48.2% | 55.7% | 42.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 21 | 2013 | 30/33 | 2.2 | 5.5 | 57.6% | 61.8% | 42.9% | 51.9% | 45.5% | 54.1% | 43.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | 2014 | 22/25 | 2.7 | 4.0 | 58.1% | 60.8% | 44.5% | 49.6% | 41.8% | 53.8% | 45.8% | 2014 | 1/1 | 1.0 | 2.0 | 67.7% | 66.7% | 30.0% | 33.3% | 33.3% | 54.8% | 32.2% |
| 23 | 2015 | 19/24 | 1.9 | 5.1 | 63.9% | 59.1% | 51.6% | 53.8% | 57.3% | 56.1% | 36.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 24 | 2016 | 45/46 | 3.8 | 3.4 | 60.1% | 67.4% | 47.6% | 55.6% | 44.9% | 59.0% | 46.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 25 | 2017 | 54/56 | 4.5 | 4.4 | 55.5% | 71.4% | 43.7% | 54.1% | 50.0% | 59.1% | 45.9% | 2017 | 9/9 | 1.3 | 2.3 | 64.6% | 64.9% | 53.3% | 55.4% | 45.8% | 61.2% | 45.4% |
| 26 | 2018 | 64/69 | 4.8 | 4.0 | 58.0% | 69.1% | 47.9% | 51.8% | 51.7% | 60.0% | 46.8% | 2018 | 6/7 | 1.2 | 2.7 | 66.1% | 57.2% | 42.7% | 55.1% | 50.9% | 52.1% | 37.9% |
| 27 | 2019 | 76/83 | 5.6 | 4.4 | 57.1% | 72.6% | 47.2% | 58.5% | 48.8% | 61.8% | 43.6% | 2019 | 16/16 | 1.1 | 2.6 | 60.0% | 59.4% | 48.8% | 51.6% | 46.9% | 55.8% | 42.4% |
| 28 | 2020 | 19/19 | 4.2 | 3.8 | 63.7% | 68.3% | 43.5% | 59.6% | 57.0% | 59.1% | 47.0% | 2020 | 5/5 | 1.2 | 3.6 | 58.0% | 56.7% | 42.8% | 52.9% | 55.6% | 50.7% | 35.1% |
| 29 | 2021 | 8/9 | 1.5 | 4.8 | 64.5% | 58.8% | 40.4% | 44.2% | 43.1% | 51.9% | 37.9% | 2021 | 6/6 | 1.0 | 1.8 | 62.3% | 59.0% | 38.9% | 44.2% | 32.0% | 50.4% | 39.1% |
| Career | — | 361/388 | 4.0 | 4.3 | 58.6% | 67.8% | 45.8% | 54.1% | 49.0% | 58.5% | 44.6% | — | 44/45 | 1.2 | 2.5 | 62.3% | 60.2% | 46.1% | 51.3% | 45.1% | 55.1% | 40.7% |
Seasons are aligned by the age each player spent most of that calendar year. 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.
| Age | Kiki Bertens | Kristie Ahn | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2008 | 1499 | 109.2 | +3.29 | +3.17 | 0.794 | 43.5% | — | — | — | 0.0% | -2.50 | — | — | — | -0.27 |
| 19 | 2011 | 1494 | 97.6 | +1.77 | -1.03 | 0.783 | 44.4% | — | — | — | 0.0% | -3.00 | — | 0–1 | — | -0.13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2012 | 1580 | 118.0 | +0.05 | -1.16 | 0.955 | 49.1% | -24 | +11 | +4 | 47.1% | -0.27 | 5–2 (71%) | 3–1 (75%) | 107.6 | -0.87 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2013 | 1551 | 121.8 | -1.34 | -0.74 | 0.952 | 48.8% | +33 | +22 | — | 44.6% | -0.39 | 5–7 (42%) | 3–3 (50%) | 98.8 | -1.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2014 | 1580 | 124.4 | -1.78 | +0.96 | 0.993 | 49.7% | -23 | +77 | — | 47.2% | -0.02 | 4–5 (44%) | 3–3 (50%) | 100.6 | -0.24 | 2014 | 1492 | 101.3 | -2.84 | +4.06 | 0.713 | 43.8% | — | — | — | 0.0% | -3.00 | — | — | — | -0.03 |
| 23 | 2015 | 1520 | 114.8 | -1.77 | -2.92 | 0.837 | 46.5% | -52 | +93 | +82 | 34.5% | -1.07 | 2–7 (22%) | 3–2 (60%) | 95.7 | -1.23 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2016 | 1689 | 132.6 | +2.91 | +1.95 | 1.122 | 52.4% | -129 | +137 | -72 | 54.6% | +0.61 | 6–5 (55%) | 6–5 (55%) | 101.8 | -1.68 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2017 | 1696 | 135.9 | +2.41 | +1.24 | 1.122 | 52.6% | -173 | +308 | -130 | 54.9% | +0.68 | 3–8 (27%) | 3–8 (27%) | 90.8 | +1.57 | 2017 | 1534 | 111.8 | +1.76 | +0.63 | 1.170 | 52.8% | -45 | — | +139 | 50.0% | +0.30 | 0–2 | 0–1 | — | -0.16 |
| 26 | 2018 | 1911 | 154.4 | +3.14 | +4.20 | 1.171 | 53.3% | -97 | +80 | -217 | 63.3% | +1.14 | 14–12 (54%) | 10–15 (40%) | 100.3 | -1.83 | 2018 | 1586 | 117.3 | -2.65 | -0.75 | 0.791 | 45.2% | -17 | — | — | 20.0% | -2.00 | 0–1 | 0–1 | — | -0.25 |
| 27 | 2019 | 1897 | 153.7 | +4.80 | +1.58 | 1.142 | 52.4% | -14 | +155 | -90 | 65.1% | +0.95 | 18–13 (58%) | 12–12 (50%) | 102.5 | +0.54 | 2019 | 1660 | 125.1 | +0.04 | -0.01 | 0.959 | 49.4% | +2 | — | — | 54.1% | -0.08 | 3–2 (60%) | 4–1 (80%) | 103.9 | +0.11 |
| 28 | 2020 | 1883 | 144.7 | +1.90 | +2.64 | 1.150 | 53.1% | +54 | +91 | — | 65.1% | +1.09 | 5–2 (71%) | 3–0 (100%) | 105.1 | +1.01 | 2020 | 1631 | 119.9 | -0.89 | -0.51 | 0.713 | 43.5% | +10 | — | — | 0.0% | -3.38 | — | 0–1 | — | -0.86 |
| 29 | 2021 | 1733 | 102.2 | -2.11 | -1.63 | 0.787 | 44.9% | +114 | +208 | — | 20.0% | -2.00 | 0–2 | — | — | +0.66 | 2021 | 1541 | 97.1 | -2.88 | -3.00 | 0.788 | 44.6% | — | — | +113 | 33.3% | -1.50 | 2–0 | 1–1 | — | +0.39 |
| Career | — | 2004 | 143.8 | +2.04 | +1.38 | 1.074 | 51.4% | -53 | +144 | -88 | 55.1% | +0.46 | 62–63 (50%) | 46–50 (48%) | 100.2 | -0.84 | — | 1708 | 120.6 | -0.47 | -0.28 | 0.906 | 48.0% | -10 | — | +124 | 38.5% | -0.86 | 5–5 (50%) | 5–5 (50%) | 101.2 | -2.38 |
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 |
|---|---|---|---|---|---|
| Mona Barthel | 3 | 6 | 9 | May 25, 2018 | H2H |
| Anastasia Pavlyuchenkova | 5 | 3 | 8 | Sep 20, 2019 | H2H |
| Sara Errani | 1 | 5 | 6 | Sep 30, 2020 | H2H |
| Petra Kvitova | 3 | 3 | 6 | May 10, 2019 | H2H |
| Annika Beck | 5 | 1 | 6 | May 26, 2017 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Serena Williams | 0 | 2 | 2 | Sep 29, 2020 | H2H |
| Donna Vekic | 0 | 2 | 2 | Feb 13, 2020 | H2H |
| Elise Mertens | 1 | 1 | 2 | Sep 3, 2019 | H2H |
| Jelena Ostapenko | 2 | 0 | 2 | Aug 31, 2019 | H2H |
| Svetlana Kuznetsova | 1 | 1 | 2 | Aug 28, 2019 | H2H |