WTA · Head to Head
Kayla Day vs Antonia Ruzic
01
In short
Antonia Ruzic leads their head-to-head 1–0. Most recent meeting: Round of 16 – Japan Open - Osaka 2026, won by Antonia Ruzic (6-4 ret.).
Head-to-head in numbers
Wins by category and stats from the scores.
| Kayla Day | — | Antonia Ruzic |
|---|---|---|
| 0 | WTA 250 | 1 |
| 0 | Sets won | 1 |
| 0 | Tie-breaks won | 0 |
| 0 | Deciding sets won | 0 |
| 1 | Retirements | 0 |
All meetings
| Year | Tournament | Round | Winner | Score |
|---|---|---|---|---|
| 2026 | Japan Open - Osaka · WTA 250 | Round of 16 | Antonia Ruzic | 6-4 ret. |
Based on tournaments synced by youaretennis.com: the history grows over time.
Comparison
| Kayla Day | — | Antonia Ruzic |
|---|---|---|
| 119 | Ranking | 84 |
| 635 | Points | 862 |
| 27.1 | Age | 23.8 |
 United States | Country |  Croatia |
| — | 2025 record | 8-10 |
| 0 | 2025 titles | 0 |
| 0 | Titles 2021-2025 | 0 |
Records and titles: Grand Slams, WTA 1000, 500 and 250 (no WTA Finals or WTA 125).
Recent form
The last 5 matches played.
Kayla Day
- L
vs Antonia Ruzic · 6-4 ret.
Japan Open - Osaka · Round of 16 · 2026
- W
vs Sofia Kenin · 6-3 6-2
Japan Open - Osaka · R32 · 2026
- L
vs Liudmila Samsonova · 7-6(4) 2-6 7-6(5)
Guadalajara Open Akron - Guadalajara · Round of 16 · 2026
- W
vs Elvina Kalieva · 7-6(9) 6-4
Guadalajara Open Akron - Guadalajara · R32 · 2026
- L
vs Elsa Jacquemot · 7-6(3) 6-2
Kia Open - Barranquilla · Round of 16 · 2026
Antonia Ruzic
- L
vs Claire Liu · 4-6 7-6(5) 6-4
Guangzhou Open - Guangzhou · R32 · 2026
- L
vs Katie Boulter · 3-6 6-3 6-3
Japan Open - Osaka · Quarterfinal · 2026
- W
vs Kayla Day · 6-4 ret.
Japan Open - Osaka · Round of 16 · 2026
- W
vs Paula Badosa Gibert · 3-6 6-4 6-3
Japan Open - Osaka · R32 · 2026
- L
vs Bianca Vanessa Andreescu · 7-5 3-6 7-5
RoveretOpen Citta della Pace - Rovereto · Round of 16 · 2026