H2H data updated: 2026-09-14 00:00 UTC
Compare the head-to-head record, career totals, season-by-season performance, and match log for Jana Fett vs Yeonwoo Ku.
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 |
|---|---|---|---|---|---|---|---|---|
| Jana Fett | 6-4 6-4 | Yeonwoo Ku | Match data | Sep 18, 2022 | Q2 | Korea Open | WTA 250 | Hard |
1 qualifying meeting shown in the table; qualifying is excluded from the H2H score. 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jana Fett | #415 | #97 | 685 | 1,669 | 25 | 39 | 39.1% | 0 | 0 | 0 | 0 | 0 | 0 |
| Yeonwoo Ku | #179 | #171 | 452 | 1,529 | 0 | 2 | 0.0% | 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 | Jana Fett | Yeonwoo Ku | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 20 | 2017 | 8–7 | 53.3% | #103 | 1,644 | 0 | 0 | 2023 | 0–1 | 0.0% | — | 1,516 | 0 | 0 |
| 21 | 2018 | 4–9 | 30.8% | #208 | 1,524 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 2019 | 2–2 | 50.0% | #243 | 1,483 | 0 | 0 | 2025 | 0–1 | 0.0% | #192 | 1,487 | 0 | 0 |
| 23 | 2020 | 1–1 | 50.0% | #209 | 1,523 | 0 | 0 | — | — | — | — | — | — | — |
| 24 | 2021 | 1–3 | 25.0% | #237 | 1,520 | 0 | 0 | — | — | — | — | — | — | — |
| 25 | 2022 | 0–4 | 0.0% | #242 | 1,567 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 2023 | 1–3 | 25.0% | #184 | 1,641 | 0 | 0 | — | — | — | — | — | — | — |
| 27 | 2024 | 6–7 | 46.2% | #136 | 1,576 | 0 | 0 | — | — | — | — | — | — | — |
| 28 | 2025 | 2–3 | 40.0% | #189 | 1,577 | 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 | Jana Fett | Yeonwoo Ku | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 20 | 2017 | 7 | 6 | 13 | 53.8% | — | — | — | — | 1 | 1 | 2 | 50.0% | 2023 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | 2018 | 2 | 6 | 8 | 25.0% | 2 | 1 | 3 | 66.7% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2019 | 1 | 1 | 2 | 50.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | 2025 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 2020 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2021 | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2022 | 0 | 2 | 2 | 0.0% | — | — | — | — | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2023 | 0 | 2 | 2 | 0.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 2024 | 4 | 5 | 9 | 44.4% | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2025 | 0 | 1 | 1 | 0.0% | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 16 | 26 | 42 | 38.1% | 8 | 8 | 16 | 50.0% | 1 | 5 | 6 | 16.7% | — | 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 61/65 of Jana Fett's and 2/2 of Yeonwoo Ku'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 | Jana Fett | Yeonwoo Ku | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 20 | 2017 | 15/15 | 3.0 | 6.7 | 56.2% | 67.7% | 41.3% | 52.3% | 49.1% | 55.9% | 46.6% | 2023 | 1/1 | 0.0 | 5.0 | 68.4% | 59.0% | 55.6% | 66.7% | — | 57.9% | 30.2% |
| 21 | 2018 | 13/13 | 2.2 | 7.5 | 50.7% | 64.3% | 39.7% | 41.8% | 40.6% | 52.6% | 44.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | 2019 | 4/4 | 3.8 | 8.3 | 47.9% | 62.4% | 37.9% | 50.5% | 29.1% | 49.8% | 39.3% | 2025 | 1/1 | 0.0 | 4.0 | 66.7% | 43.2% | 36.4% | 53.9% | 66.7% | 40.9% | 33.3% |
| 23 | 2020 | 2/2 | 5.5 | 7.5 | 50.8% | 78.5% | 44.6% | 73.1% | 36.7% | 61.9% | 45.4% | — | —/— | — | — | — | — | — | — | — | — | — |
| 24 | 2021 | 4/4 | 0.8 | 3.5 | 58.7% | 56.2% | 43.0% | 47.4% | 82.9% | 50.8% | 40.1% | — | —/— | — | — | — | — | — | — | — | — | — |
| 25 | 2022 | 4/4 | 4.5 | 8.3 | 52.2% | 60.7% | 34.6% | 41.9% | 41.3% | 48.2% | 33.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2023 | 4/4 | 2.0 | 8.5 | 62.0% | 57.6% | 36.6% | 55.4% | 37.5% | 49.5% | 41.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 27 | 2024 | 12/13 | 1.6 | 6.7 | 59.7% | 58.5% | 44.2% | 52.9% | 54.8% | 52.2% | 46.1% | — | —/— | — | — | — | — | — | — | — | — | — |
| 28 | 2025 | 3/6 | 3.0 | 9.0 | 57.4% | 62.8% | 33.0% | 33.7% | 46.4% | 49.7% | 41.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 61/65 | 2.6 | 7.1 | 55.3% | 63.1% | 40.4% | 49.0% | 47.5% | 52.7% | 43.6% | — | 2/2 | 0.0 | 4.5 | 67.5% | 51.1% | 46.0% | 60.3% | 33.3% | 49.4% | 31.8% |
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 | Jana Fett | Yeonwoo Ku | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 19 | 2016 | 1490 | 96.7 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2022 | 1496 | 99.4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2017 | 1644 | 119.9 | -0.29 | +1.28 | 1.056 | 51.4% | -57 | — | — | 55.6% | +0.44 | 2–4 (33%) | 0–1 | — | +0.17 | 2023 | 1516 | 101.8 | -1.57 | -2.27 | 0.717 | 44.5% | — | — | — | 0.0% | -3.00 | — | — | — | +0.01 |
| 21 | 2018 | 1524 | 106.0 | -1.70 | +0.11 | 0.933 | 48.7% | -32 | +98 | — | 36.7% | -0.43 | 1–3 (25%) | 0–2 | — | +0.18 | 2024 | 1514 | 98.1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2019 | 1484 | 97.2 | -1.86 | -1.66 | 0.782 | 44.8% | — | — | — | 40.0% | -1.10 | 2–0 | 1–1 | — | +0.23 | 2025 | 1488 | 94.0 | -1.85 | +0.96 | 0.564 | 38.1% | — | — | — | 0.0% | -4.50 | — | — | — | +0.03 |
| 23 | 2020 | 1523 | 109.7 | +1.65 | -0.17 | 1.192 | 53.3% | — | — | — | 33.3% | -1.67 | 0–1 | — | — | -0.06 | 2026 | 1497 | 104.6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2021 | 1521 | 103.6 | -1.74 | -0.56 | 0.815 | 45.8% | -16 | — | — | 25.0% | -2.00 | — | — | — | +0.03 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2022 | 1567 | 100.5 | -0.90 | -0.58 | 0.636 | 41.1% | — | — | — | 11.1% | -3.33 | 0–1 | — | — | -0.13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2023 | 1642 | 103.3 | -1.83 | -0.89 | 0.826 | 46.1% | — | — | — | 33.3% | -1.11 | 0–1 | 0–1 | — | -0.22 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 2024 | 1577 | 112.4 | -1.98 | -0.69 | 0.964 | 49.1% | -4 | +7 | — | 43.3% | -0.57 | 3–3 (50%) | — | — | +0.38 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2025 | 1578 | 117.0 | -1.91 | -0.62 | 0.826 | 46.0% | — | +81 | — | 45.5% | -0.36 | 0–1 | 2–1 (67%) | — | -0.06 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1670 | 112.1 | -1.28 | -0.08 | 0.921 | 48.3% | -33 | +59 | — | 41.1% | -0.62 | 8–14 (36%) | 3–6 (33%) | 94.1 | +0.83 | — | 1529 | 100.1 | -1.71 | -0.66 | 0.628 | 41.3% | — | — | — | 0.0% | -3.75 | — | — | — | +2.00 |
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 |
|---|---|---|---|---|---|
| Iga Swiatek | 0 | 2 | 2 | Apr 16, 2025 | H2H |
| Saisai Zheng | 1 | 1 | 2 | Oct 31, 2024 | H2H |
| Jessica Bouzas Maneiro | 1 | 1 | 2 | Oct 24, 2024 | H2H |
| Daria Kasatkina | 0 | 2 | 2 | Sep 28, 2024 | H2H |
| Rebecca Peterson | 0 | 2 | 2 | Oct 28, 2021 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Lois Boisson | 0 | 1 | 1 | Sep 15, 2025 | H2H |
| Claire Liu | 0 | 1 | 1 | Oct 12, 2023 | H2H |