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: 2026-09-12 00:00 UTC
Kimberly Birrell vs Dayeon Back H2H: 1-0
Kimberly Birrell holds a 1–0 lead over Dayeon Back 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 2023 Korea 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.
H2H
1
–
0
1 main-draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Kimberly Birrell | 6-0 6-1 | Dayeon Back | Match data | Oct 13, 2023* | R16 | Korea 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 |
| Dayeon Back | #268 | #245 | 299 | 1,541 | 1 | 4 | 20.0% | 0 | 0 | 0 | 0 | 0 | 0 |
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 | Dayeon Back | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 18 | 2016 | 1–2 | 33.3% | #516 | 1,508 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | 2022 | 0–1 | 0.0% | #609 | 1,512 | 0 | 0 |
| 21 | 2019 | 3–2 | 60.0% | #250 | 1,516 | 0 | 0 | 2023 | 1–1 | 50.0% | #457 | 1,526 | 0 | 0 |
| 22 | — | — | — | — | — | — | — | 2024 | 0–1 | 0.0% | #316 | 1,506 | 0 | 0 |
| 23 | 2021 | 2–3 | 40.0% | #741 | 1,517 | 0 | 0 | 2025 | 0–1 | 0.0% | #307 | 1,501 | 0 | 0 |
| 24 | 2022 | 1–1 | 50.0% | #174 | 1,486 | 0 | 0 | — | — | — | — | — | — | — |
| 25 | 2023 | 8–10 | 44.4% | #115 | 1,557 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 2024 | 7–8 | 46.7% | #113 | 1,688 | 0 | 0 | — | — | — | — | — | — | — |
| 27 | 2025 | 14–18 | 43.8% | #98 | 1,678 | 0 | 0 | — | — | — | — | — | — | — |
| 28 | 2026 | 12–18 | 40.0% | #71 | 1,695 | 0 | 0 | — | — | — | — | — | — | — |
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 | Dayeon Back | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 18 | 2016 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2022 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | 2019 | 3 | 2 | 5 | 60.0% | — | — | — | — | — | — | — | — | 2023 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — |
| 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 2021 | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — | 2025 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 24 | 2022 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2023 | 6 | 7 | 13 | 46.2% | 1 | 2 | 3 | 33.3% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2024 | 5 | 7 | 12 | 41.7% | — | — | — | — | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 2025 | 13 | 12 | 25 | 52.0% | 0 | 3 | 3 | 0.0% | 1 | 3 | 4 | 25.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2026 | 9 | 12 | 21 | 42.9% | 1 | 2 | 3 | 33.3% | 2 | 4 | 6 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 40 | 46 | 86 | 46.5% | 2 | 7 | 9 | 22.2% | 6 | 9 | 15 | 40.0% | — | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — |
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 5/5 of Dayeon Back'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 | Dayeon Back | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 18 | 2016 | 3/3 | 2.0 | 2.0 | 62.8% | 47.3% | 53.1% | 47.6% | 50.0% | 50.4% | 31.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 20 | — | —/— | — | — | — | — | — | — | — | — | — | 2022 | 1/1 | 0.0 | 2.0 | 61.5% | 41.7% | 40.0% | 16.7% | 0.0% | 41.0% | 29.3% |
| 21 | 2019 | 5/5 | 2.6 | 4.8 | 62.8% | 63.4% | 36.3% | 60.9% | 38.9% | 53.5% | 39.6% | 2023 | 2/2 | 2.0 | 3.0 | 54.5% | 51.0% | 38.7% | 48.8% | 27.3% | 45.5% | 39.0% |
| 22 | — | —/— | — | — | — | — | — | — | — | — | — | 2024 | 1/1 | 0.0 | 2.0 | 55.0% | 54.5% | 25.9% | 40.0% | 22.2% | 41.7% | 42.6% |
| 23 | 2021 | 5/5 | 2.6 | 3.6 | 64.2% | 63.4% | 42.2% | 53.1% | 44.5% | 55.8% | 41.1% | 2025 | 1/1 | 0.0 | 7.0 | 55.2% | 59.5% | 30.0% | 33.3% | 23.1% | 46.3% | 46.9% |
| 24 | 2022 | 2/2 | 1.5 | 8.0 | 56.7% | 55.4% | 42.7% | 42.3% | 23.2% | 49.9% | 40.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 25 | 2023 | 18/18 | 1.6 | 4.4 | 60.7% | 62.1% | 44.2% | 52.1% | 49.4% | 55.1% | 45.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2024 | 15/15 | 2.2 | 3.5 | 64.0% | 63.3% | 47.4% | 52.6% | 48.1% | 57.6% | 40.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 27 | 2025 | 17/32 | 2.1 | 6.4 | 59.2% | 64.9% | 40.0% | 53.6% | 42.7% | 54.7% | 39.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 28 | 2026 | 28/31 | 1.9 | 5.8 | 63.5% | 62.5% | 40.7% | 48.0% | 56.5% | 54.5% | 41.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 93/111 | 2.0 | 5.0 | 62.1% | 62.5% | 42.6% | 51.4% | 48.7% | 54.9% | 41.2% | — | 5/5 | 0.8 | 3.4 | 56.1% | 51.5% | 34.7% | 37.5% | 20.0% | 44.0% | 39.4% |
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 | Dayeon Back | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 18 | 2016 | 1509 | 103.2 | -0.55 | -0.09 | 0.637 | 40.5% | +9 | — | — | 33.3% | -1.67 | — | — | — | -0.35 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2018 | 1476 | 98.5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2022 | 1512 | 97.1 | -1.57 | -1.15 | 0.496 | 35.0% | — | — | — | 0.0% | -5.00 | — | — | — | +0.26 |
| 21 | 2019 | 1516 | 110.7 | -0.48 | -1.55 | 0.850 | 46.8% | +33 | — | — | 50.0% | -0.33 | 2–0 | 1–0 | — | -0.02 | 2023 | 1527 | 103.2 | -0.33 | -0.69 | 0.715 | 42.4% | — | — | — | 40.0% | -1.60 | 1–0 | 1–0 | — | -0.06 |
| 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 1507 | 95.1 | -1.39 | -0.55 | 0.731 | 42.2% | — | — | — | 0.0% | -3.50 | — | — | — | +0.37 |
| 23 | 2021 | 1518 | 104.1 | -2.12 | -0.93 | 0.929 | 49.0% | +30 | — | — | 36.4% | -1.09 | 1–0 | 0–1 | — | +0.48 | 2025 | 1501 | 102.7 | -2.49 | -0.83 | 0.873 | 46.6% | — | — | — | 0.0% | -2.50 | — | — | — | -0.02 |
| 24 | 2022 | 1486 | 95.4 | -2.40 | +1.40 | 0.815 | 45.9% | — | — | — | 40.0% | -1.40 | 1–0 | — | — | +0.14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2026 | 1695 | 133.4 | -1.46 | -0.89 | 0.908 | 48.1% | +45 | -270 | -78 | 42.7% | -0.55 | 7–8 (47%) | 3–7 (30%) | 96.3 | -0.67 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 | +1.15 | — | 1542 | 99.2 | -1.22 | -0.78 | 0.703 | 41.7% | — | — | — | 18.2% | -2.73 | 1–0 | 1–0 | — | +11.00 |
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.
Dayeon Back
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Beatriz Haddad Maia | 0 | 1 | 1 | Sep 17, 2025 | H2H |
| Carol Zhao | 0 | 1 | 1 | Sep 19, 2024 | H2H |
| Kimberly Birrell | 0 | 1 | 1 | Oct 13, 2023 | H2H |
| Jelena Ostapenko | 1 | 0 | 1 | Oct 12, 2023 | H2H |
| Na Lae Han | 0 | 1 | 1 | Sep 22, 2022 | H2H |