H2H data updated: 2026-09-14 00:00 UTC
Katerina Siniakova holds a 1–0 lead over Anna Zaja in their WTA head-to-head. Across 1 main-draw meeting, Katerina Siniakova leads 1–0 on clay. Most recently, Katerina Siniakova won the 2018 Nurnberg round of 32 2-6 6-4 6-1.
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 |
|---|---|---|---|---|---|---|---|---|
| Katerina Siniakova | 2-6 6-4 6-1 | Anna Zaja | Match data | May 24, 2018* | R32 | Nurnberg | International → modern equivalent 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Katerina Siniakova | #42 | #27 | 1,718 | 1,893 | 228 | 246 | 48.1% | 0 | 0 | 0 | 0 | 5 | 5 |
| Anna Zaja | #1,298 | #184 | 314 | 1,545 | 2 | 6 | 25.0% | 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 | Katerina Siniakova | Anna Zaja | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | 2013 | 0–1 | 0.0% | #171 | 1,488 | 0 | 0 | — | — | — | — | — | — | — |
| 18 | 2014 | 4–6 | 40.0% | #84 | 1,521 | 0 | 0 | — | — | — | — | — | — | — |
| 19 | 2015 | 13–20 | 39.4% | #102 | 1,522 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 2016 | 18–18 | 50.0% | #52 | 1,765 | 0 | 0 | — | — | — | — | — | — | — |
| 21 | 2017 | 23–23 | 50.0% | #49 | 1,695 | 0 | 2 | — | — | — | — | — | — | — |
| 22 | 2018 | 26–22 | 54.2% | #31 | 1,779 | 0 | 2 | — | — | — | — | — | — | — |
| 23 | 2019 | 20–28 | 41.7% | #58 | 1,674 | 0 | 2 | — | — | — | — | — | — | — |
| 24 | 2020 | 6–13 | 31.6% | #59 | 1,701 | 0 | 2 | — | — | — | — | — | — | — |
| 25 | 2021 | 22–17 | 56.4% | #49 | 1,801 | 0 | 2 | — | — | — | — | — | — | — |
| 26 | 2022 | 17–19 | 47.2% | #49 | 1,762 | 0 | 3 | 2017 | 1–3 | 25.0% | #218 | 1,508 | 0 | 0 |
| 27 | 2023 | 22–17 | 56.4% | #45 | 1,807 | 0 | 5 | 2018 | 0–1 | 0.0% | #213 | 1,476 | 0 | 0 |
| 28 | 2024 | 26–26 | 50.0% | #45 | 1,802 | 0 | 5 | — | — | — | — | — | — | — |
| 29 | 2025 | 17–20 | 45.9% | #48 | 1,883 | 0 | 5 | — | — | — | — | — | — | — |
| 30 | 2026 | 14–16 | 46.7% | #42 | 1,820 | 0 | 5 | 2021 | 1–2 | 33.3% | #325 | 1,479 | 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 | Katerina Siniakova | Anna Zaja | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 17 | 2013 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2014 | 4 | 5 | 9 | 44.4% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2015 | 6 | 12 | 18 | 33.3% | 4 | 5 | 9 | 44.4% | 3 | 3 | 6 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2016 | 10 | 10 | 20 | 50.0% | 6 | 5 | 11 | 54.5% | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2017 | 12 | 14 | 26 | 46.2% | 10 | 6 | 16 | 62.5% | 1 | 3 | 4 | 25.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2018 | 17 | 14 | 31 | 54.8% | 7 | 6 | 13 | 53.8% | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2019 | 10 | 18 | 28 | 35.7% | 9 | 7 | 16 | 56.3% | 1 | 3 | 4 | 25.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2020 | 1 | 9 | 10 | 10.0% | 5 | 4 | 9 | 55.6% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2021 | 9 | 12 | 21 | 42.9% | 7 | 3 | 10 | 70.0% | 6 | 2 | 8 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2022 | 11 | 11 | 22 | 50.0% | 6 | 5 | 11 | 54.5% | 0 | 3 | 3 | 0.0% | 2017 | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | — | — | — | — |
| 27 | 2023 | 16 | 14 | 30 | 53.3% | 0 | 1 | 1 | 0.0% | 6 | 2 | 8 | 75.0% | 2018 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 28 | 2024 | 17 | 17 | 34 | 50.0% | 4 | 6 | 10 | 40.0% | 5 | 3 | 8 | 62.5% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2025 | 14 | 11 | 25 | 56.0% | 0 | 5 | 5 | 0.0% | 3 | 4 | 7 | 42.9% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | 2026 | 8 | 9 | 17 | 47.1% | 4 | 4 | 8 | 50.0% | 2 | 3 | 5 | 40.0% | 2021 | — | — | — | — | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% |
| Career | — | 135 | 157 | 292 | 46.2% | 62 | 58 | 120 | 51.7% | 31 | 31 | 62 | 50.0% | — | 0 | 1 | 1 | 0.0% | 2 | 4 | 6 | 33.3% | 0 | 1 | 1 | 0.0% |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 446/476 of Katerina Siniakova's and 8/8 of Anna Zaja'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 | Katerina Siniakova | Anna Zaja | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 17 | 2013 | 1/1 | 5.0 | 11.0 | 61.3% | 56.1% | 38.9% | 50.0% | 71.4% | 49.5% | 44.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 18 | 2014 | 10/10 | 1.7 | 4.4 | 61.7% | 63.9% | 42.1% | 54.2% | 38.1% | 55.3% | 45.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 19 | 2015 | 26/33 | 1.7 | 5.5 | 66.1% | 62.0% | 50.4% | 53.7% | 47.1% | 58.1% | 41.4% | — | —/— | — | — | — | — | — | — | — | — | — |
| 20 | 2016 | 34/37 | 2.7 | 4.0 | 58.7% | 63.5% | 43.7% | 51.7% | 50.0% | 55.3% | 43.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 21 | 2017 | 45/46 | 2.2 | 3.8 | 62.4% | 61.8% | 42.4% | 54.6% | 49.1% | 54.7% | 43.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | 2018 | 48/48 | 4.2 | 4.0 | 59.3% | 64.0% | 45.4% | 48.7% | 46.8% | 56.4% | 43.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 23 | 2019 | 47/48 | 2.8 | 2.9 | 60.4% | 62.6% | 46.1% | 50.1% | 46.4% | 56.0% | 45.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 24 | 2020 | 19/19 | 1.7 | 3.1 | 65.8% | 55.8% | 42.7% | 50.3% | 46.1% | 51.4% | 40.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 25 | 2021 | 39/39 | 1.7 | 5.9 | 61.3% | 64.5% | 45.4% | 54.1% | 55.5% | 57.2% | 46.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2022 | 32/36 | 1.5 | 4.9 | 64.5% | 58.7% | 41.3% | 52.7% | 50.7% | 52.6% | 42.8% | 2017 | 4/4 | 2.3 | 4.0 | 63.3% | 69.3% | 43.2% | 47.2% | 26.3% | 60.1% | 34.0% |
| 27 | 2023 | 38/39 | 2.3 | 5.1 | 62.6% | 62.5% | 44.4% | 45.2% | 43.9% | 55.8% | 45.8% | 2018 | 1/1 | 4.0 | 1.0 | 70.5% | 63.6% | 43.5% | 42.9% | 33.3% | 57.7% | 40.7% |
| 28 | 2024 | 50/52 | 1.8 | 5.3 | 61.6% | 63.1% | 44.7% | 45.5% | 51.0% | 56.0% | 45.9% | — | —/— | — | — | — | — | — | — | — | — | — |
| 29 | 2025 | 28/38 | 1.8 | 5.6 | 61.3% | 63.9% | 41.8% | 51.3% | 47.9% | 55.4% | 44.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 30 | 2026 | 29/30 | 1.8 | 4.7 | 61.5% | 64.3% | 45.2% | 58.2% | 44.6% | 56.9% | 44.0% | 2021 | 3/3 | 1.3 | 2.3 | 58.7% | 58.1% | 36.6% | 42.5% | 42.3% | 49.2% | 34.1% |
| Career | — | 446/476 | 2.3 | 4.5 | 61.8% | 62.6% | 44.4% | 51.0% | 48.3% | 55.6% | 44.3% | — | 8/8 | 2.1 | 3.0 | 62.5% | 64.4% | 40.8% | 44.9% | 33.1% | 55.7% | 34.9% |
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 | Katerina Siniakova | Anna Zaja | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 17 | 2013 | 1489 | 101.5 | -2.26 | +1.26 | 0.882 | 47.3% | — | — | — | 33.3% | -1.00 | 0–1 | — | — | -0.01 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2014 | 1521 | 119.3 | -0.71 | -0.45 | 1.019 | 50.3% | +20 | — | — | 43.5% | -0.22 | 1–2 (33%) | 2–2 (50%) | 100.8 | +0.46 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2015 | 1523 | 112.2 | -0.42 | -0.27 | 0.987 | 49.9% | -25 | +16 | +104 | 41.3% | -0.43 | 4–5 (44%) | 3–6 (33%) | 96.6 | +0.31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2016 | 1765 | 130.6 | -0.14 | +0.26 | 0.975 | 49.6% | -53 | -89 | -86 | 49.4% | -0.07 | 7–6 (54%) | 3–2 (60%) | 103.3 | -2.24 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2017 | 1695 | 133.7 | -0.94 | +0.48 | 0.963 | 49.3% | -23 | +84 | -66 | 50.0% | -0.08 | 11–9 (55%) | 4–2 (67%) | 103.3 | -1.76 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2018 | 1780 | 137.2 | -0.09 | +0.44 | 0.989 | 49.7% | -11 | -32 | -109 | 53.0% | +0.04 | 13–10 (57%) | 10–8 (56%) | 102.2 | +0.17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2019 | 1675 | 133.8 | -0.06 | +1.86 | 1.029 | 50.5% | -18 | +94 | -38 | 42.3% | -0.28 | 8–11 (42%) | 5–5 (50%) | 96.9 | -0.30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2020 | 1701 | 130.6 | -3.03 | -0.58 | 0.836 | 46.1% | -49 | +82 | — | 33.3% | -1.10 | 2–2 (50%) | 2–0 | — | -1.42 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2021 | 1802 | 144.9 | +1.25 | +3.21 | 1.089 | 51.8% | -109 | +51 | -13 | 54.7% | +0.44 | 9–8 (53%) | 8–3 (73%) | 107.7 | -2.85 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2022 | 1763 | 133.3 | -2.97 | +0.63 | 0.904 | 47.8% | -22 | +55 | -76 | 46.2% | -0.36 | 8–6 (57%) | 3–3 (50%) | 101.6 | -1.47 | 2017 | 1509 | 110.2 | -0.48 | -3.26 | 0.853 | 47.9% | — | +50 | — | 33.3% | -1.11 | 0–1 | — | — | +0.11 |
| 27 | 2023 | 1808 | 135.0 | -0.13 | +2.23 | 1.035 | 50.6% | -25 | — | -7 | 55.8% | +0.38 | 4–5 (44%) | 5–6 (45%) | 98.4 | -1.66 | 2018 | 1477 | 97.5 | -0.01 | -0.55 | 0.962 | 48.8% | — | — | — | 33.3% | -1.00 | 0–1 | — | — | -0.08 |
| 28 | 2024 | 1803 | 141.8 | -0.23 | +2.61 | 1.042 | 50.8% | -30 | -33 | +120 | 55.1% | +0.39 | 7–13 (35%) | 4–8 (33%) | 87.5 | -1.28 | 2019 | 1453 | 98.6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2025 | 1883 | 142.0 | -0.67 | +0.92 | 1.002 | 50.0% | +19 | -217 | +75 | 48.8% | -0.13 | 4–8 (33%) | 5–4 (56%) | 94.0 | -1.48 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | 2026 | 1821 | 142.6 | +0.08 | +1.58 | 1.022 | 50.5% | +25 | -134 | +86 | 50.0% | -0.07 | 4–7 (36%) | 4–4 (50%) | 95.9 | -0.57 | 2021 | 1480 | 94.2 | +0.50 | -3.51 | 0.672 | 42.2% | — | — | — | 28.6% | -2.43 | 1–0 | — | — | -0.03 |
| Career | — | 1893 | 141.3 | -0.47 | +1.23 | 0.997 | 49.9% | -24 | +8 | +14 | 49.1% | -0.05 | 82–93 (47%) | 58–53 (52%) | 97.7 | -2.99 | — | 1546 | 101.0 | -0.05 | -3.02 | 0.788 | 45.9% | — | +50 | — | 31.6% | -1.58 | 1–2 (33%) | — | — | 0.00 |
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 |
|---|---|---|---|---|---|
| Ekaterina Alexandrova | 3 | 5 | 8 | Sep 20, 2025 | H2H |
| Daria Kasatkina | 2 | 6 | 8 | Sep 18, 2025 | H2H |
| Elena Rybakina | 3 | 5 | 8 | Jun 19, 2025 | H2H |
| Kristina Mladenovic | 4 | 4 | 8 | Apr 23, 2021 | H2H |
| Jessica Pegula | 1 | 6 | 7 | Jun 17, 2026 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Elena-Gabriela Ruse | 0 | 1 | 1 | Jul 9, 2021 | H2H |
| Viktoriya Tomova | 1 | 0 | 1 | Jul 8, 2021 | H2H |
| Ann Li | 0 | 1 | 1 | Jun 23, 2021 | H2H |
| Katerina Siniakova | 0 | 1 | 1 | May 24, 2018 | H2H |
| Ekaterina Alexandrova | 0 | 1 | 1 | Aug 30, 2017 | H2H |