H2H data updated: 2026-11-07 00:00 UTC
Viktoriya Tomova holds a 1–0 lead over Kayla Day in their WTA head-to-head. Across 1 main-draw meeting, Viktoriya Tomova leads 1–0 on hard courts. Most recently, Viktoriya Tomova won the 2024 Australian Open first round 6-4 6-2.
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 |
|---|---|---|---|---|---|---|---|---|
| Viktoriya Tomova | 6-4 6-2 | Kayla Day | Match data | Jan 16, 2024* | R128 | Australian Open | Grand Slam | Hard |
| Viktoriya Tomova | 3-6 6-0 6-3 | Kayla Day | Match data | Jan 6, 2024 | Q1 | Hobart International | WTA 250 | Hard |
1 qualifying meeting shown in the table; qualifying is excluded from the H2H score. 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Viktoriya Tomova | #381 | #46 | 1,235 | 1,764 | 54 | 106 | 33.8% | 0 | 0 | 0 | 0 | 0 | 0 |
| Kayla Day | #121 | #84 | 847 | 1,638 | 11 | 31 | 26.2% | 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 | Viktoriya Tomova | 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 |
| 22 | 2017 | 2–4 | 33.3% | #145 | 1,508 | 0 | 0 | 2022 | 0–2 | 0.0% | #197 | 1,534 | 0 | 0 |
| 23 | 2018 | 3–6 | 33.3% | #156 | 1,498 | 0 | 0 | 2023 | 3–6 | 33.3% | #87 | 1,564 | 0 | 0 |
| 24 | 2019 | 1–4 | 20.0% | #148 | 1,546 | 0 | 0 | 2024 | 0–7 | 0.0% | #241 | 1,435 | 0 | 0 |
| 25 | 2020 | 1–3 | 25.0% | #139 | 1,526 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 2021 | 6–11 | 35.3% | #117 | 1,442 | 0 | 0 | 2026 | 4–7 | 36.4% | #121 | 1,602 | 0 | 0 |
| 27 | 2022 | 5–10 | 33.3% | #90 | 1,601 | 0 | 0 | — | — | — | — | — | — | — |
| 28 | 2023 | 4–17 | 19.0% | #80 | 1,643 | 0 | 0 | — | — | — | — | — | — | — |
| 29 | 2024 | 22–27 | 44.9% | #53 | 1,715 | 0 | 0 | — | — | — | — | — | — | — |
| 30 | 2025 | 9–20 | 31.0% | #131 | 1,651 | 0 | 0 | — | — | — | — | — | — | — |
| 31 | 2026 | 1–4 | 20.0% | #381 | 1,567 | 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 | Viktoriya Tomova | 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% | — | — | — | — | — | — | — | — |
| 22 | 2017 | 1 | 1 | 2 | 50.0% | 1 | 3 | 4 | 25.0% | — | — | — | — | 2022 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 2018 | 1 | 2 | 3 | 33.3% | 1 | 3 | 4 | 25.0% | 1 | 1 | 2 | 50.0% | 2023 | 1 | 4 | 5 | 20.0% | 2 | 2 | 4 | 50.0% | — | — | — | — |
| 24 | 2019 | 1 | 3 | 4 | 25.0% | — | — | — | — | 0 | 1 | 1 | 0.0% | 2024 | 0 | 3 | 3 | 0.0% | 0 | 3 | 3 | 0.0% | 0 | 1 | 1 | 0.0% |
| 25 | 2020 | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2021 | 0 | 3 | 3 | 0.0% | 6 | 7 | 13 | 46.2% | 0 | 1 | 1 | 0.0% | 2026 | 4 | 5 | 9 | 44.4% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% |
| 27 | 2022 | 2 | 5 | 7 | 28.6% | 0 | 3 | 3 | 0.0% | 3 | 2 | 5 | 60.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2023 | 2 | 8 | 10 | 20.0% | 1 | 5 | 6 | 16.7% | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2024 | 11 | 17 | 28 | 39.3% | 8 | 8 | 16 | 50.0% | 3 | 2 | 5 | 60.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | 2025 | 5 | 9 | 14 | 35.7% | 3 | 7 | 10 | 30.0% | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 2026 | 0 | 2 | 2 | 0.0% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 24 | 52 | 76 | 31.6% | 21 | 39 | 60 | 35.0% | 9 | 15 | 24 | 37.5% | — | 9 | 22 | 31 | 29.0% | 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 145/160 of Viktoriya Tomova's and 42/42 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 | Viktoriya Tomova | 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% |
| 22 | 2017 | 6/6 | 1.7 | 1.5 | 72.8% | 60.3% | 46.1% | 35.0% | 44.5% | 56.0% | 42.5% | 2022 | 2/2 | 4.0 | 2.5 | 66.5% | 68.4% | 39.1% | 56.4% | 50.0% | 58.6% | 36.6% |
| 23 | 2018 | 9/9 | 1.1 | 2.9 | 66.6% | 48.1% | 37.1% | 47.8% | 38.3% | 44.2% | 44.9% | 2023 | 9/9 | 2.2 | 3.0 | 58.1% | 62.9% | 43.8% | 57.4% | 39.7% | 55.0% | 39.3% |
| 24 | 2019 | 5/5 | 0.8 | 3.4 | 62.3% | 58.7% | 39.4% | 41.9% | 45.2% | 51.2% | 39.3% | 2024 | 7/7 | 3.7 | 3.3 | 66.8% | 58.5% | 42.2% | 52.8% | 37.1% | 55.1% | 36.5% |
| 25 | 2020 | 4/4 | 1.3 | 3.8 | 65.2% | 49.0% | 42.4% | 36.7% | 50.7% | 46.8% | 45.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2021 | 17/17 | 0.8 | 3.3 | 68.7% | 54.9% | 42.6% | 41.9% | 48.8% | 51.0% | 45.3% | 2026 | 11/11 | 5.0 | 3.8 | 66.2% | 64.3% | 45.4% | 62.5% | 55.9% | 58.1% | 40.0% |
| 27 | 2022 | 15/15 | 0.9 | 2.4 | 68.8% | 57.4% | 45.0% | 54.4% | 43.5% | 53.5% | 40.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 28 | 2023 | 20/21 | 1.5 | 3.3 | 63.5% | 57.3% | 39.6% | 45.1% | 45.1% | 50.8% | 39.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 29 | 2024 | 47/49 | 1.3 | 3.0 | 65.3% | 59.4% | 46.0% | 50.8% | 44.0% | 54.8% | 44.4% | — | —/— | — | — | — | — | — | — | — | — | — |
| 30 | 2025 | 17/29 | 1.4 | 3.8 | 61.4% | 54.3% | 38.9% | 47.5% | 42.6% | 48.1% | 43.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 31 | 2026 | 5/5 | 1.6 | 4.8 | 62.5% | 54.5% | 40.1% | 55.7% | 48.9% | 48.7% | 44.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 145/160 | 1.2 | 3.1 | 65.6% | 56.6% | 42.7% | 47.6% | 44.6% | 51.7% | 43.2% | — | 42/42 | 3.5 | 3.9 | 59.9% | 63.1% | 42.5% | 56.0% | 43.5% | 55.1% | 38.5% |
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 | Viktoriya Tomova | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 1540 | 104.9 | -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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2020 | 1450 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2016 | 1497 | 104.3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2017 | 1509 | 98.4 | -0.79 | +0.52 | 0.967 | 49.1% | — | +67 | — | 30.8% | -1.08 | 1–2 (33%) | 1–1 | — | +0.01 | 2022 | 1535 | 97.1 | -0.90 | -1.76 | 0.884 | 47.0% | — | — | — | 0.0% | -2.00 | — | 0–1 | — | +0.44 |
| 23 | 2018 | 1498 | 104.0 | -5.76 | -0.20 | 0.804 | 44.7% | -56 | +84 | — | 35.0% | -1.85 | 1–1 | 2–0 | — | +0.74 | 2023 | 1565 | 120.2 | -0.78 | -1.35 | 0.874 | 47.7% | -48 | +5 | — | 31.6% | -0.84 | 1–0 | 0–1 | — | +0.61 |
| 24 | 2019 | 1547 | 105.0 | -2.47 | -0.75 | 0.807 | 45.5% | -50 | — | — | 25.0% | -1.67 | 1–1 | — | — | +0.17 | 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 | 2020 | 1526 | 109.2 | -2.67 | +0.48 | 0.848 | 46.0% | -30 | — | — | 30.0% | -0.70 | 1–1 | 0–2 | — | +0.02 | 2025 | 1476 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2021 | 1442 | 108.6 | -3.41 | +0.59 | 0.924 | 48.1% | -35 | +62 | — | 40.5% | -0.60 | 3–5 (38%) | 1–0 | — | +0.90 | 2026 | 1603 | 131.5 | +0.09 | -1.35 | 0.955 | 49.6% | -22 | — | — | 45.8% | -0.17 | 1–3 (25%) | 2–3 (40%) | 99.1 | -0.41 |
| 27 | 2022 | 1602 | 113.8 | -1.76 | -1.10 | 0.877 | 47.3% | -117 | +19 | +102 | 36.4% | -0.76 | 3–2 (60%) | 0–2 | — | -0.44 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2023 | 1644 | 118.1 | -3.62 | -1.92 | 0.809 | 45.4% | -12 | -6 | -29 | 28.0% | -1.76 | 2–6 (25%) | 1–5 (17%) | 93.5 | -1.26 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2024 | 1715 | 131.7 | -2.17 | +0.80 | 0.982 | 49.6% | -48 | -21 | -1 | 48.6% | -0.28 | 4–11 (27%) | 11–8 (58%) | 96.9 | +0.48 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | 2025 | 1651 | 117.5 | -5.60 | +0.08 | 0.844 | 45.8% | -26 | -28 | +19 | 32.3% | -1.42 | 2–4 (33%) | 3–4 (43%) | 97.0 | -1.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 2026 | 1568 | 108.0 | -2.39 | +0.53 | 0.871 | 46.7% | — | +25 | — | 27.3% | -1.54 | 0–1 | 0–1 | — | -0.37 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1764 | 118.5 | -3.07 | -0.03 | 0.896 | 47.5% | -45 | +15 | +23 | 37.6% | -0.97 | 18–34 (35%) | 19–23 (45%) | 93.2 | -0.49 | — | 1638 | 117.2 | -0.91 | -1.83 | 0.857 | 47.1% | -12 | +30 | — | 33.0% | -1.16 | 3–11 (21%) | 3–8 (27%) | 90.7 | +3.02 |
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 | 4 | 0 | 4 | Jul 16, 2025 | H2H |
| Maria Sakkari | 0 | 4 | 4 | Mar 8, 2025 | H2H |
| Ekaterina Alexandrova | 1 | 3 | 4 | Aug 28, 2024 | H2H |
| Xinyu Wang | 0 | 4 | 4 | Jul 3, 2024 | H2H |
| Danielle Collins | 0 | 3 | 3 | Jul 27, 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 |
| Antonia Ruzic | 0 | 1 | 1 | Oct 22, 2026 | H2H |