Kimberly Birrell
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Donna Vekic | 2 | 2 | 4 | Oct 31, 2025 | H2H |
| Petra Marcinko | 2 | 1 | 3 | Aug 30, 2026 | H2H |
| Ann Li | 0 | 3 | 3 | Jun 16, 2026 | H2H |
| Victoria Mboko | 0 | 3 | 3 | Mar 6, 2026 | H2H |
| Anastasia Potapova | 3 | 0 | 3 | Jan 13, 2026 | H2H |
H2H data updated: 2026-09-13 00:00 UTC
Kimberly Birrell vs Saisai Zheng H2H: 1-0
Kimberly Birrell holds a 1–0 lead over Saisai Zheng in their WTA head-to-head. Across 1 main-draw meeting, Kimberly Birrell leads 1–0 on hard courts. Most recently, Kimberly Birrell won the 2024 Japan Women's Open first round 6-2 6-3.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H
1
–
0
1 main-draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Kimberly Birrell | 6-2 6-3 | Saisai Zheng | Match data | Oct 17, 2024* | R32 | Japan Women's Open | 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.
Career Comparison
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kimberly Birrell | #71 | #60 | 999 | 1,834 | 48 | 62 | 43.6% | 0 | 0 | 0 | 0 | 0 | 0 |
| Saisai Zheng | #692 | #34 | 1,585 | 1,776 | 87 | 133 | 39.5% | 0 | 0 | 0 | 1 | 0 | 1 |
Career Progression by Age
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 | Kimberly Birrell | Saisai Zheng | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | — | — | — | — | — | — | — | 2011 | 0–2 | 0.0% | #276 | 1,473 | 0 | 0 |
| 18 | 2016 | 1–2 | 33.3% | #516 | 1,508 | 0 | 0 | 2012 | 2–3 | 40.0% | #138 | 1,483 | 0 | 0 |
| 19 | — | — | — | — | — | — | — | 2013 | 1–3 | 25.0% | #145 | 1,467 | 0 | 0 |
| 20 | — | — | — | — | — | — | — | 2014 | 6–6 | 50.0% | #100 | 1,552 | 0 | 0 |
| 21 | 2019 | 3–2 | 60.0% | #250 | 1,516 | 0 | 0 | 2015 | 9–22 | 29.0% | #72 | 1,495 | 0 | 0 |
| 22 | — | — | — | — | — | — | — | 2016 | 13–24 | 35.1% | #85 | 1,542 | 0 | 0 |
| 23 | 2021 | 2–3 | 40.0% | #741 | 1,517 | 0 | 0 | 2017 | 5–10 | 33.3% | #93 | 1,618 | 0 | 0 |
| 24 | 2022 | 1–1 | 50.0% | #174 | 1,486 | 0 | 0 | 2018 | 13–12 | 52.0% | #38 | 1,678 | 0 | 0 |
| 25 | 2023 | 8–10 | 44.4% | #115 | 1,557 | 0 | 0 | 2019 | 21–23 | 47.7% | #42 | 1,750 | 0 | 1 |
| 26 | 2024 | 7–8 | 46.7% | #113 | 1,688 | 0 | 0 | 2020 | 6–4 | 60.0% | #41 | 1,768 | 0 | 1 |
| 27 | 2025 | 14–18 | 43.8% | #98 | 1,678 | 0 | 0 | 2021 | 10–17 | 37.0% | #79 | 1,686 | 0 | 1 |
| 28 | 2026 | 12–18 | 40.0% | #71 | 1,695 | 0 | 0 | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | 2024 | 1–5 | 16.7% | #692 | 1,548 | 0 | 1 |
| 31 | — | — | — | — | — | — | — | 2025 | 0–2 | 0.0% | — | 1,491 | 0 | 1 |
Surface Results by Age
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 | Kimberly Birrell | Saisai Zheng | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2011 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 18 | 2016 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | 2012 | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2013 | 1 | 3 | 4 | 25.0% | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2014 | 6 | 5 | 11 | 54.5% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 21 | 2019 | 3 | 2 | 5 | 60.0% | — | — | — | — | — | — | — | — | 2015 | 8 | 17 | 25 | 32.0% | 1 | 2 | 3 | 33.3% | 0 | 3 | 3 | 0.0% |
| 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 10 | 17 | 27 | 37.0% | 0 | 3 | 3 | 0.0% | 3 | 4 | 7 | 42.9% |
| 23 | 2021 | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — | 2017 | 4 | 7 | 11 | 36.4% | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% |
| 24 | 2022 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | 2018 | 12 | 7 | 19 | 63.2% | 0 | 3 | 3 | 0.0% | 1 | 2 | 3 | 33.3% |
| 25 | 2023 | 6 | 7 | 13 | 46.2% | 1 | 2 | 3 | 33.3% | 1 | 1 | 2 | 50.0% | 2019 | 18 | 16 | 34 | 52.9% | 3 | 4 | 7 | 42.9% | 0 | 3 | 3 | 0.0% |
| 26 | 2024 | 5 | 7 | 12 | 41.7% | — | — | — | — | 2 | 1 | 3 | 66.7% | 2020 | 6 | 4 | 10 | 60.0% | — | — | — | — | — | — | — | — |
| 27 | 2025 | 13 | 12 | 25 | 52.0% | 0 | 3 | 3 | 0.0% | 1 | 3 | 4 | 25.0% | 2021 | 7 | 13 | 20 | 35.0% | 3 | 4 | 7 | 42.9% | — | — | — | — |
| 28 | 2026 | 9 | 12 | 21 | 42.9% | 1 | 2 | 3 | 33.3% | 2 | 4 | 6 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 1 | 4 | 5 | 20.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| Career | — | 40 | 46 | 86 | 46.5% | 2 | 7 | 9 | 22.2% | 6 | 9 | 15 | 40.0% | — | 75 | 100 | 175 | 42.9% | 8 | 20 | 28 | 28.6% | 4 | 13 | 17 | 23.5% |
Performance Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 93/111 of Kimberly Birrell's and 195/218 of Saisai Zheng'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 | Kimberly Birrell | Saisai Zheng | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 17 | — | —/— | — | — | — | — | — | — | — | — | — | 2011 | 2/2 | 0.0 | 0.5 | 57.0% | 46.2% | 38.1% | 48.6% | 17.7% | 43.0% | 38.5% |
| 18 | 2016 | 3/3 | 2.0 | 2.0 | 62.8% | 47.3% | 53.1% | 47.6% | 50.0% | 50.4% | 31.6% | 2012 | 5/5 | 0.8 | 1.2 | 59.6% | 59.8% | 41.1% | 51.6% | 46.4% | 52.1% | 43.1% |
| 19 | — | —/— | — | — | — | — | — | — | — | — | — | 2013 | 4/4 | 1.8 | 3.8 | 63.2% | 56.7% | 39.1% | 50.4% | 42.0% | 50.4% | 45.6% |
| 20 | — | —/— | — | — | — | — | — | — | — | — | — | 2014 | 8/12 | 1.6 | 1.4 | 66.9% | 56.0% | 51.5% | 45.6% | 52.8% | 54.4% | 45.8% |
| 21 | 2019 | 5/5 | 2.6 | 4.8 | 62.8% | 63.4% | 36.3% | 60.9% | 38.9% | 53.5% | 39.6% | 2015 | 20/31 | 0.9 | 2.2 | 66.6% | 52.7% | 45.0% | 41.5% | 52.4% | 50.4% | 40.2% |
| 22 | — | —/— | — | — | — | — | — | — | — | — | — | 2016 | 34/37 | 0.9 | 2.1 | 63.7% | 56.5% | 46.6% | 51.9% | 45.9% | 52.5% | 44.2% |
| 23 | 2021 | 5/5 | 2.6 | 3.6 | 64.2% | 63.4% | 42.2% | 53.1% | 44.5% | 55.8% | 41.1% | 2017 | 15/15 | 1.2 | 2.2 | 65.3% | 54.2% | 43.1% | 51.6% | 58.7% | 49.8% | 38.9% |
| 24 | 2022 | 2/2 | 1.5 | 8.0 | 56.7% | 55.4% | 42.7% | 42.3% | 23.2% | 49.9% | 40.8% | 2018 | 21/25 | 0.9 | 2.0 | 66.8% | 58.5% | 45.1% | 54.0% | 49.2% | 54.0% | 45.2% |
| 25 | 2023 | 18/18 | 1.6 | 4.4 | 60.7% | 62.1% | 44.2% | 52.1% | 49.4% | 55.1% | 45.2% | 2019 | 44/44 | 1.4 | 2.7 | 64.7% | 59.2% | 44.3% | 49.7% | 45.7% | 53.7% | 43.6% |
| 26 | 2024 | 15/15 | 2.2 | 3.5 | 64.0% | 63.3% | 47.4% | 52.6% | 48.1% | 57.6% | 40.8% | 2020 | 10/10 | 1.3 | 2.0 | 70.3% | 62.9% | 43.1% | 43.5% | 45.9% | 57.5% | 46.4% |
| 27 | 2025 | 17/32 | 2.1 | 6.4 | 59.2% | 64.9% | 40.0% | 53.6% | 42.7% | 54.7% | 39.2% | 2021 | 26/27 | 0.9 | 1.8 | 67.3% | 58.4% | 47.9% | 53.1% | 43.0% | 54.9% | 42.5% |
| 28 | 2026 | 28/31 | 1.9 | 5.8 | 63.5% | 62.5% | 40.7% | 48.0% | 56.5% | 54.5% | 41.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 30 | — | —/— | — | — | — | — | — | — | — | — | — | 2024 | 6/6 | 1.0 | 3.3 | 62.2% | 51.9% | 44.6% | 40.1% | 45.4% | 49.1% | 39.6% |
| Career | — | 93/111 | 2.0 | 5.0 | 62.1% | 62.5% | 42.6% | 51.4% | 48.7% | 54.9% | 41.2% | — | 195/220 | 1.1 | 2.2 | 65.4% | 57.2% | 45.2% | 49.6% | 47.4% | 52.9% | 43.1% |
Advanced Statistics Comparison by Age
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 | Kimberly Birrell | Saisai Zheng | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2011 | 1474 | 95.9 | -1.89 | -2.23 | 0.676 | 41.1% | — | — | — | 0.0% | -4.25 | — | — | — | +0.25 |
| 18 | 2016 | 1509 | 103.2 | -0.55 | -0.09 | 0.637 | 40.5% | +9 | — | — | 33.3% | -1.67 | — | — | — | -0.35 | 2012 | 1483 | 99.4 | -0.72 | -1.45 | 0.900 | 48.2% | +11 | — | — | 33.3% | -1.55 | 0–1 | 1–0 | — | +0.37 |
| 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2013 | 1468 | 100.9 | -1.08 | +0.55 | 0.920 | 48.0% | +5 | — | — | 30.0% | -1.00 | 1–1 | 1–2 (33%) | — | +0.17 |
| 20 | 2018 | 1476 | 98.5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2014 | 1553 | 119.6 | -1.26 | +0.86 | 1.006 | 49.7% | +9 | — | — | 53.3% | -0.23 | 2–4 (33%) | 1–1 | — | -0.37 |
| 21 | 2019 | 1516 | 110.7 | -0.48 | -1.55 | 0.850 | 46.8% | +33 | — | — | 50.0% | -0.33 | 2–0 | 1–0 | — | -0.02 | 2015 | 1496 | 110.7 | -5.38 | -1.24 | 0.811 | 45.6% | +9 | +30 | +74 | 30.9% | -1.50 | 5–3 (63%) | 2–1 (67%) | 105.2 | -0.08 |
| 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 1542 | 123.0 | -2.10 | +1.09 | 0.930 | 48.2% | +24 | -74 | +9 | 40.0% | -0.83 | 0–8 (0%) | 2–2 (50%) | 91.8 | +0.81 |
| 23 | 2021 | 1518 | 104.1 | -2.12 | -0.93 | 0.929 | 49.0% | +30 | — | — | 36.4% | -1.09 | 1–0 | 0–1 | — | +0.48 | 2017 | 1619 | 110.1 | -3.22 | -1.56 | 0.775 | 44.5% | -8 | -100 | — | 34.2% | -1.42 | 5–3 (63%) | 3–1 (75%) | 104.9 | -0.08 |
| 24 | 2022 | 1486 | 95.4 | -2.40 | +1.40 | 0.815 | 45.9% | — | — | — | 40.0% | -1.40 | 1–0 | — | — | +0.14 | 2018 | 1679 | 118.9 | -1.21 | +1.53 | 0.983 | 49.6% | +22 | -169 | -79 | 54.5% | +0.13 | 3–4 (43%) | 0–1 | — | +1.42 |
| 25 | 2023 | 1557 | 123.2 | -1.73 | +1.11 | 1.007 | 50.1% | +43 | -88 | — | 46.2% | -0.08 | 1–2 (33%) | 3–2 (60%) | 100.5 | +0.87 | 2019 | 1750 | 134.4 | -2.18 | +0.80 | 0.942 | 48.7% | -10 | -123 | -200 | 48.0% | -0.28 | 8–6 (57%) | 11–3 (79%) | 107.3 | +0.31 |
| 26 | 2024 | 1689 | 122.0 | +0.40 | -1.41 | 0.962 | 49.5% | +9 | — | -77 | 43.3% | -0.43 | 1–1 | 0–4 (0%) | — | +0.83 | 2020 | 1768 | 132.2 | +0.85 | +2.96 | 1.090 | 51.7% | -8 | — | — | 58.3% | +0.58 | 2–2 (50%) | 1–1 | — | +0.03 |
| 27 | 2025 | 1679 | 134.0 | -1.71 | -2.60 | 0.866 | 46.9% | +54 | -259 | -143 | 44.7% | -0.36 | 6–6 (50%) | 5–6 (45%) | 97.7 | -0.02 | 2021 | 1686 | 121.1 | -1.18 | -0.16 | 0.941 | 48.6% | -18 | -68 | — | 38.7% | -0.89 | 4–4 (50%) | 1–1 | — | -0.36 |
| 28 | 2026 | 1695 | 133.4 | -1.45 | -0.88 | 0.908 | 48.1% | +45 | -271 | -78 | 42.7% | -0.55 | 7–8 (47%) | 3–7 (30%) | 96.3 | -0.68 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 1548 | 93.3 | -2.71 | -2.47 | 0.779 | 44.6% | -4 | — | — | 26.7% | -1.73 | 1–2 (33%) | 0–1 | — | +0.51 |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 1492 | 101.5 | — | — | — | — | — | — | — | 0.0% | -2.25 | — | 0–2 | — | -0.05 |
| Career | — | 1835 | 128.4 | -1.23 | -0.86 | 0.914 | 48.2% | +39 | -206 | -98 | 43.7% | -0.46 | 19–17 (53%) | 12–20 (38%) | 96.8 | +1.14 | — | 1777 | 123.8 | -2.10 | +0.33 | 0.915 | 48.0% | +3 | -88 | -35 | 41.7% | -0.74 | 31–38 (45%) | 23–16 (59%) | 104.4 | +1.33 |
Career Rivalries
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
Saisai Zheng
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Alison Riske-Amritraj | 3 | 3 | 6 | Sep 13, 2019 | H2H |
| Qiang Wang | 1 | 4 | 5 | May 28, 2019 | H2H |
| Simona Halep | 0 | 3 | 3 | May 3, 2021 | H2H |
| Stefanie Voegele | 1 | 2 | 3 | Apr 9, 2021 | H2H |
| Lin Zhu | 3 | 0 | 3 | Mar 19, 2021 | H2H |