Antonia Ruzic
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Paula Badosa | 1 | 1 | 2 | Oct 20, 2026 | H2H |
| Ann Li | 0 | 2 | 2 | Aug 31, 2026 | H2H |
| Madison Keys | 0 | 2 | 2 | Aug 4, 2026 | H2H |
| Elena-Gabriela Ruse | 0 | 2 | 2 | Apr 22, 2026 | H2H |
| Karolina Muchova | 0 | 2 | 2 | Mar 9, 2026 | H2H |
H2H data updated: 2026-10-22 00:00 UTC
Antonia Ruzic vs Kayla Day H2H: 1-0
Antonia Ruzic holds a 1–0 lead over Kayla Day in their WTA head-to-head. Across 1 main-draw meeting, Antonia Ruzic leads 1–0 on hard courts. Most recently, Antonia Ruzic won the 2026 Japan Women's Open second round 6-4 0-0.
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 |
|---|---|---|---|---|---|---|---|---|
| Antonia Ruzic | 6-4 (ret.) | Kayla Day | Match data | Oct 22, 2026 | R16 | Japan Women's Open | WTA 250 | Hard |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Antonia Ruzic | #91 | #50 | 1,130 | 1,801 | 25 | 31 | 44.6% | 0 | 0 | 0 | 0 | 0 | 0 |
| Kayla Day | #119 | #84 | 847 | 1,638 | 11 | 31 | 26.2% | 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 | Antonia Ruzic | 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 |
| 21 | 2024 | 3–2 | 60.0% | #142 | 1,562 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 2025 | 8–10 | 44.4% | #70 | 1,752 | 0 | 0 | 2022 | 0–2 | 0.0% | #197 | 1,534 | 0 | 0 |
| 23 | 2026 | 14–19 | 42.4% | #91 | 1,707 | 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 | 4–7 | 36.4% | #119 | 1,616 | 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 | Antonia Ruzic | 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% | — | — | — | — | — | — | — | — |
| 21 | 2024 | 3 | 2 | 5 | 60.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2025 | 5 | 7 | 12 | 41.7% | 2 | 2 | 4 | 50.0% | 1 | 1 | 2 | 50.0% | 2022 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 2026 | 11 | 11 | 22 | 50.0% | 2 | 4 | 6 | 33.3% | 1 | 4 | 5 | 20.0% | 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 | 4 | 5 | 9 | 44.4% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% |
| Career | — | 19 | 20 | 39 | 48.7% | 4 | 6 | 10 | 40.0% | 2 | 5 | 7 | 28.6% | — | 9 | 22 | 31 | 29.0% | 2 | 7 | 9 | 22.2% | 0 | 2 | 2 | 0.0% |
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 47/58 of Antonia Ruzic'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 | Antonia Ruzic | 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% |
| 21 | 2024 | 5/5 | 0.2 | 2.8 | 66.0% | 57.2% | 39.6% | 45.4% | 54.6% | 51.0% | 43.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | 2025 | 13/18 | 1.3 | 2.1 | 63.9% | 61.4% | 50.4% | 46.6% | 43.4% | 57.4% | 41.3% | 2022 | 2/2 | 4.0 | 2.5 | 66.5% | 68.4% | 39.1% | 56.4% | 50.0% | 58.6% | 36.6% |
| 23 | 2026 | 29/35 | 0.9 | 3.4 | 66.9% | 55.8% | 44.3% | 48.6% | 44.9% | 51.6% | 41.3% | 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 | 11/11 | 5.0 | 3.8 | 66.2% | 64.3% | 45.4% | 62.5% | 55.9% | 58.1% | 40.0% |
| Career | — | 47/57 | 1.0 | 3.0 | 66.0% | 57.5% | 45.5% | 47.7% | 45.5% | 53.1% | 41.5% | — | 42/42 | 3.5 | 3.9 | 59.9% | 63.1% | 42.5% | 56.0% | 44.1% | 55.1% | 38.5% |
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 | Antonia Ruzic | 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 | 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 | 2021 | 1488 | 96.0 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2018 | 1487 | 91.2 | -2.87 | -2.16 | 0.673 | 41.8% | — | — | — | 20.0% | -3.20 | 0–1 | — | — | +0.16 |
| 19 | 2022 | 1495 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2019 | 1463 | 99.5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2023 | 1512 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2020 | 1450 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2024 | 1563 | 106.7 | -1.62 | -1.12 | 0.885 | 47.3% | +22 | — | — | 54.5% | -0.36 | 1–0 | — | — | +0.34 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2025 | 1753 | 132.0 | -0.70 | -0.50 | 0.969 | 49.0% | -24 | -114 | — | 42.5% | -0.35 | 3–1 (75%) | 2–1 (67%) | 104.4 | +0.11 | 2022 | 1535 | 99.5 | -0.90 | -1.76 | 0.884 | 47.0% | — | — | — | 0.0% | -2.00 | — | 0–1 | — | +0.44 |
| 23 | 2026 | 1707 | 133.2 | -3.76 | -0.55 | 0.854 | 46.6% | +10 | -76 | +1 | 40.5% | -0.65 | 9–5 (64%) | 0–5 (0%) | 102.9 | -1.44 | 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 | 1476 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 1616 | 131.5 | +0.09 | -1.35 | 0.955 | 49.6% | -18 | — | — | 44.0% | -0.31 | 1–3 (25%) | 2–3 (40%) | 99.1 | -0.42 |
| Career | — | 1801 | 130.4 | -2.69 | -0.60 | 0.886 | 47.3% | +1 | -91 | +1 | 42.3% | -0.53 | 13–6 (68%) | 2–6 (25%) | 107.0 | -1.77 | — | 1638 | 117.4 | -0.91 | -1.83 | 0.857 | 47.1% | -10 | +30 | — | 32.6% | -1.19 | 3–11 (21%) | 3–8 (27%) | 90.7 | +3.00 |
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.
Kayla Day
all rivalries →| 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 |