H2H data updated: 2026-09-14 00:00 UTC
Zhuoxuan Bai holds a 1–0 lead over Kayla Day in their WTA head-to-head. Across 1 main-draw meeting, Zhuoxuan Bai leads 1–0 on clay. Most recently, Zhuoxuan Bai won the 2024 Morocco Open first round 6-3 7-6(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 |
|---|---|---|---|---|---|---|---|---|
| Zhuoxuan Bai | 6-3 7-6(4) | Kayla Day | Match data | May 22, 2024* | R32 | Morocco Open | WTA 250 | Clay |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zhuoxuan Bai | #252 | #83 | 858 | 1,642 | 8 | 15 | 34.8% | 0 | 0 | 0 | 0 | 0 | 0 |
| Kayla Day | #117 | #84 | 847 | 1,637 | 9 | 29 | 23.7% | 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 | Zhuoxuan Bai | Kayla Day | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 16 | — | — | — | — | — | — | — | 2016 | 1–2 | 33.3% | #198 | 1,540 | 0 | 0 |
| 17 | — | — | — | — | — | — | — | 2017 | 3–5 | 37.5% | #150 | 1,524 | 0 | 0 |
| 18 | — | — | — | — | — | — | — | 2018 | 0–2 | 0.0% | #313 | 1,487 | 0 | 0 |
| 20 | 2023 | 3–5 | 37.5% | #88 | 1,573 | 0 | 0 | — | — | — | — | — | — | — |
| 21 | 2024 | 2–8 | 20.0% | #305 | 1,525 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 2025 | 2–1 | 66.7% | #485 | 1,538 | 0 | 0 | 2022 | 0–2 | 0.0% | #197 | 1,534 | 0 | 0 |
| 23 | 2026 | 1–1 | 50.0% | #252 | 1,607 | 0 | 0 | 2023 | 3–6 | 33.3% | #87 | 1,564 | 0 | 0 |
| 24 | — | — | — | — | — | — | — | 2024 | 0–7 | 0.0% | #241 | 1,435 | 0 | 0 |
| 26 | — | — | — | — | — | — | — | 2026 | 2–5 | 28.6% | #117 | 1,604 | 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 | Zhuoxuan Bai | Kayla Day | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2017 | 3 | 4 | 7 | 42.9% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2018 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 20 | 2023 | 2 | 3 | 5 | 40.0% | 0 | 1 | 1 | 0.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2024 | 1 | 3 | 4 | 25.0% | 1 | 3 | 4 | 25.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2025 | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | 2022 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 2026 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | 2023 | 1 | 4 | 5 | 20.0% | 2 | 2 | 4 | 50.0% | — | — | — | — |
| 24 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 0 | 3 | 3 | 0.0% | 0 | 3 | 3 | 0.0% | 0 | 1 | 1 | 0.0% |
| 26 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 2 | 3 | 5 | 40.0% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% |
| Career | — | 6 | 8 | 14 | 42.9% | 1 | 4 | 5 | 20.0% | 1 | 3 | 4 | 25.0% | — | 7 | 20 | 27 | 25.9% | 2 | 7 | 9 | 22.2% | 0 | 2 | 2 | 0.0% |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 20/20 of Zhuoxuan Bai's and 38/39 of Kayla Day'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 | Zhuoxuan Bai | Kayla Day | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — | —/— | — | — | — | — | — | — | — | — | — | 2016 | 3/3 | 1.0 | 3.7 | 59.0% | 55.2% | 30.3% | 50.6% | 66.7% | 44.4% | 38.1% |
| 17 | — | —/— | — | — | — | — | — | — | — | — | — | 2017 | 8/8 | 3.4 | 5.5 | 48.8% | 66.2% | 45.1% | 51.9% | 31.0% | 55.7% | 38.9% |
| 18 | — | —/— | — | — | — | — | — | — | — | — | — | 2018 | 2/2 | 5.0 | 6.0 | 48.1% | 68.0% | 33.7% | 50.0% | 35.0% | 49.8% | 33.8% |
| 20 | 2023 | 8/8 | 1.4 | 2.6 | 60.2% | 60.9% | 45.3% | 48.3% | 33.5% | 54.5% | 39.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 21 | 2024 | 10/10 | 2.4 | 1.6 | 66.9% | 60.3% | 44.1% | 52.1% | 50.2% | 54.3% | 39.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | — | —/— | — | — | — | — | — | — | — | — | — | 2022 | 2/2 | 4.0 | 2.5 | 66.5% | 68.4% | 39.1% | 56.4% | 50.0% | 58.6% | 36.6% |
| 23 | 2026 | 2/2 | 2.0 | 2.5 | 58.8% | 62.3% | 35.2% | 65.2% | 40.0% | 51.0% | 39.5% | 2023 | 9/9 | 2.2 | 3.0 | 58.1% | 62.9% | 43.8% | 57.4% | 39.7% | 55.0% | 39.3% |
| 24 | — | —/— | — | — | — | — | — | — | — | — | — | 2024 | 7/7 | 3.7 | 3.3 | 66.8% | 58.5% | 42.2% | 52.8% | 37.1% | 55.1% | 36.5% |
| 26 | — | —/— | — | — | — | — | — | — | — | — | — | 2026 | 7/8 | 4.0 | 3.4 | 65.3% | 59.9% | 47.4% | 52.6% | 46.8% | 55.8% | 40.7% |
| Career | — | 20/23 | 2.0 | 2.1 | 63.4% | 60.8% | 43.7% | 51.9% | 42.5% | 54.1% | 39.4% | — | 38/39 | 3.2 | 3.8 | 59.1% | 62.2% | 42.6% | 53.5% | 41.1% | 54.4% | 38.4% |
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 | Zhuoxuan Bai | Kayla Day | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 2019 | 1495 | 92.6 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 1540 | 107.8 | -2.89 | +0.53 | 0.685 | 42.0% | +14 | — | — | 0.0% | -4.75 | — | — | — | -0.17 |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2017 | 1524 | 111.0 | 0.00 | -2.37 | 0.877 | 47.2% | +13 | — | — | 45.0% | -0.85 | 1–3 (25%) | — | — | -0.14 |
| 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2018 | 1487 | 91.2 | -2.87 | -2.16 | 0.673 | 41.8% | — | — | — | 20.0% | -3.20 | 0–1 | — | — | +0.16 |
| 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2019 | 1463 | 99.5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2023 | 1573 | 108.0 | +0.01 | -2.47 | 0.869 | 47.0% | -7 | — | — | 42.1% | -0.79 | 1–2 (33%) | 2–1 (67%) | — | +0.28 | 2020 | 1450 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2024 | 1526 | 107.7 | -2.11 | -3.01 | 0.858 | 47.0% | +5 | -66 | — | 30.4% | -1.74 | 0–3 (0%) | 3–0 (100%) | 98.5 | +0.77 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2025 | 1539 | 111.5 | — | — | — | — | +9 | — | — | 57.1% | +0.57 | 1–0 | — | — | +0.23 | 2022 | 1535 | 99.5 | -0.90 | -1.76 | 0.884 | 47.0% | — | — | — | 0.0% | -2.00 | — | 0–1 | — | +0.44 |
| 23 | 2026 | 1607 | 119.8 | -1.49 | +2.21 | 0.805 | 45.2% | — | — | — | 40.0% | -1.80 | 1–0 | 1–0 | — | -0.23 | 2023 | 1565 | 118.9 | -0.78 | -1.35 | 0.874 | 47.7% | -48 | +5 | — | 31.6% | -0.84 | 1–0 | 0–1 | — | +0.61 |
| 24 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 1436 | 102.7 | -2.31 | -3.54 | 0.812 | 46.2% | -2 | +63 | — | 22.2% | -1.61 | 0–4 (0%) | 1–3 (25%) | 92.8 | +0.78 |
| 25 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 1474 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 1604 | 129.8 | -0.29 | -0.02 | 0.921 | 48.5% | -18 | — | — | 35.3% | -0.94 | 1–2 (33%) | 1–1 | — | -0.59 |
| Career | — | 1643 | 112.0 | -1.20 | -2.27 | 0.857 | 46.8% | +1 | -66 | — | 38.9% | -1.11 | 3–5 (38%) | 6–1 (86%) | 102.3 | +4.57 | — | 1637 | 116.0 | -1.09 | -1.64 | 0.842 | 46.7% | -9 | +30 | — | 29.9% | -1.39 | 3–10 (23%) | 2–6 (25%) | 91.1 | +2.87 |
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 |
|---|---|---|---|---|---|
| Tatjana Maria | 0 | 2 | 2 | Feb 8, 2024 | H2H |
| Aryna Sabalenka | 0 | 1 | 1 | Jan 21, 2026 | H2H |
| Anastasia Pavlyuchenkova | 1 | 0 | 1 | Jan 18, 2026 | H2H |
| Dominika Salkova | 0 | 1 | 1 | Oct 31, 2025 | H2H |
| Hanyu Guo | 1 | 0 | 1 | Oct 30, 2025 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Madison Keys | 1 | 2 | 3 | Jun 30, 2026 | H2H |
| Caroline Dolehide | 0 | 2 | 2 | Apr 3, 2024 | H2H |
| Marie Bouzkova | 0 | 2 | 2 | Oct 12, 2023 | H2H |
| Garbiñe Muguruza | 0 | 2 | 2 | Aug 4, 2017 | H2H |
| Shuai Zhang | 0 | 1 | 1 | Aug 15, 2026 | H2H |