WTA · Head to Head
Katerina Siniakova vs Mary Stoiana
10
In short
Katerina Siniakova leads their head-to-head 1–0. Most recent meeting: Quarterfinal – Japan Open - Osaka 2026, won by Katerina Siniakova (6-1 6-2).
Head-to-head in numbers
Wins by category and stats from the scores.
| Katerina Siniakova | — | Mary Stoiana |
|---|---|---|
| 1 | WTA 250 | 0 |
| 2 | Sets won | 0 |
| 0 | Tie-breaks won | 0 |
| 0 | Deciding sets won | 0 |
All meetings
| Year | Tournament | Round | Winner | Score |
|---|---|---|---|---|
| 2026 | Japan Open - Osaka · WTA 250 | Quarterfinal | Katerina Siniakova | 6-1 6-2 |
Based on tournaments synced by youaretennis.com: the history grows over time.
Comparison
| Katerina Siniakova | — | Mary Stoiana |
|---|---|---|
| 49 | Ranking | 113 |
| 1.114 | Points | 673 |
| 30.5 | Age | 23.5 |
 Czechia | Country |  United States |
| 17-20 | 2025 record | — |
| 0 | 2025 titles | 0 |
| 3 | 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.
Katerina Siniakova
- L
vs Claire Liu · w/o
Guangzhou Open - Guangzhou · Round of 16 · 2026
- W
vs Lanlana Tararudee · 2-6 6-1 6-4
Guangzhou Open - Guangzhou · R32 · 2026
- W
vs Ashlyn Krueger · 6-1 6-0
Japan Open - Osaka · Final · 2026
- W
vs Katie Boulter · 6-1 6-4
Japan Open - Osaka · Semifinal · 2026
- W
vs Mary Stoiana · 6-1 6-2
Japan Open - Osaka · Quarterfinal · 2026
Mary Stoiana
- L
vs Katerina Siniakova · 6-1 6-2
Japan Open - Osaka · Quarterfinal · 2026
- W
vs Moyuka Uchijima · 6-2 2-6 6-3
Japan Open - Osaka · Round of 16 · 2026
- W
vs Oleksandra Oliynykova · 6-2 6-3
Japan Open - Osaka · R32 · 2026
- L
vs Paula Badosa Gibert · 6-4 6-2
SP Open - Sao Paulo · Quarterfinal · 2026
- W
vs Dominika Salkova · 7-6(5) 6-1
SP Open - Sao Paulo · Round of 16 · 2026