H2H data updated: 2026-09-13 00:00 UTC
Compare the head-to-head record, career totals, season-by-season performance, and match log for Harriet Dart vs Sayaka Ishii.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Harriet Dart | 4-6 6-1 6-3 | Sayaka Ishii | Match data | Sep 23, 2023 | Q1 | Pan Pacific Open | WTA 500 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Harriet Dart | #131 | #70 | 924 | 1,730 | 45 | 79 | 36.3% | 0 | 0 | 0 | 0 | 0 | 0 |
| Sayaka Ishii | #466 | #188 | 376 | 1,580 | 2 | 3 | 40.0% | 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 | Harriet Dart | Sayaka Ishii | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 18 | 2015 | 0–1 | 0.0% | #443 | 1,494 | 0 | 0 | 2024 | 2–2 | 50.0% | #196 | 1,571 | 0 | 0 |
| 19 | — | — | — | — | — | — | — | 2025 | 0–1 | 0.0% | #398 | 1,565 | 0 | 0 |
| 20 | 2017 | 0–1 | 0.0% | #314 | 1,470 | 0 | 0 | — | — | — | — | — | — | — |
| 21 | 2018 | 1–4 | 20.0% | #149 | 1,507 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 2019 | 4–10 | 28.6% | #142 | 1,538 | 0 | 0 | — | — | — | — | — | — | — |
| 23 | 2020 | 1–1 | 50.0% | #150 | 1,531 | 0 | 0 | — | — | — | — | — | — | — |
| 24 | 2021 | 4–10 | 28.6% | #123 | 1,548 | 0 | 0 | — | — | — | — | — | — | — |
| 25 | 2022 | 14–15 | 48.3% | #98 | 1,641 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 2023 | 7–10 | 41.2% | #121 | 1,672 | 0 | 0 | — | — | — | — | — | — | — |
| 27 | 2024 | 10–13 | 43.5% | #104 | 1,694 | 0 | 0 | — | — | — | — | — | — | — |
| 28 | 2025 | 1–7 | 12.5% | #172 | 1,529 | 0 | 0 | — | — | — | — | — | — | — |
| 29 | 2026 | 3–7 | 30.0% | #131 | 1,617 | 0 | 0 | — | — | — | — | — | — | — |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 117/124 of Harriet Dart's and 4/5 of Sayaka Ishii'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 | Harriet Dart | Sayaka Ishii | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 18 | 2015 | 1/1 | 0.0 | 3.0 | 57.1% | 50.0% | 29.2% | 56.3% | 42.9% | 41.1% | 40.0% | 2024 | 3/4 | 0.3 | 6.0 | 60.5% | 64.4% | 47.3% | 58.3% | 42.9% | 57.5% | 49.4% |
| 19 | — | —/— | — | — | — | — | — | — | — | — | — | 2025 | 1/1 | 0.0 | 1.0 | 72.7% | 43.8% | 33.3% | 16.7% | 100.0% | 40.9% | 30.0% |
| 20 | 2017 | 1/1 | 2.0 | 8.0 | 47.1% | 51.5% | 48.6% | 64.3% | 50.0% | 50.0% | 34.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 21 | 2018 | 2/5 | 4.5 | 4.5 | 59.3% | 64.9% | 43.9% | 56.8% | 41.1% | 56.6% | 38.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | 2019 | 14/14 | 2.0 | 3.1 | 56.1% | 56.6% | 41.3% | 49.5% | 37.8% | 50.0% | 36.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 23 | 2020 | 2/2 | 0.0 | 3.5 | 66.8% | 55.2% | 36.4% | 50.0% | 50.0% | 49.4% | 44.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 24 | 2021 | 14/14 | 1.7 | 4.2 | 50.1% | 64.0% | 46.1% | 50.8% | 55.0% | 54.8% | 43.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 25 | 2022 | 29/29 | 2.0 | 3.3 | 54.1% | 61.8% | 46.7% | 49.7% | 40.5% | 54.7% | 42.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2023 | 17/17 | 3.5 | 4.5 | 51.5% | 68.9% | 47.4% | 45.3% | 46.0% | 58.3% | 43.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 27 | 2024 | 23/23 | 2.2 | 6.2 | 57.0% | 63.1% | 40.4% | 56.6% | 53.6% | 53.2% | 43.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 28 | 2025 | 4/8 | 0.8 | 4.3 | 53.5% | 59.0% | 41.0% | 49.3% | 42.8% | 50.2% | 41.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 29 | 2026 | 10/10 | 3.1 | 5.0 | 52.5% | 63.0% | 39.5% | 45.9% | 53.0% | 51.5% | 41.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 117/124 | 2.2 | 4.4 | 54.2% | 62.5% | 43.7% | 50.5% | 46.7% | 53.7% | 41.9% | — | 4/5 | 0.3 | 4.8 | 63.6% | 59.2% | 43.8% | 47.9% | 57.1% | 53.3% | 44.6% |
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 | Harriet Dart | Sayaka Ishii | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2022 | 1480 | 95.5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2023 | 1472 | 99.9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2015 | 1494 | 97.9 | -0.68 | -1.37 | 0.679 | 40.6% | — | — | — | 0.0% | -4.00 | — | — | — | -0.13 | 2024 | 1572 | 119.4 | +0.69 | +1.59 | 1.162 | 53.4% | +18 | — | — | 62.5% | +1.50 | 1–1 | 1–1 | — | +0.19 |
| 19 | 2016 | 1477 | 97.9 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 1566 | 99.7 | +0.48 | +0.58 | 0.508 | 35.7% | — | — | — | 0.0% | -4.50 | — | — | — | -0.08 |
| 20 | 2017 | 1470 | 101.5 | +1.70 | +1.04 | 0.679 | 43.1% | — | — | — | 0.0% | -3.50 | — | — | — | -0.12 | 2026 | 1499 | 94.6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2018 | 1507 | 106.2 | -0.70 | +0.69 | 0.892 | 47.0% | — | — | +72 | 25.0% | -1.33 | 1–1 | 0–1 | — | -0.41 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2019 | 1538 | 100.9 | -4.04 | -4.25 | 0.729 | 43.5% | -23 | — | +48 | 31.4% | -1.94 | 4–3 (57%) | 3–0 (100%) | 104.7 | +0.53 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2020 | 1531 | 107.7 | +0.76 | +0.07 | 0.872 | 46.8% | — | — | — | 40.0% | -1.40 | 1–0 | 1–0 | — | -0.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2021 | 1548 | 117.8 | -1.61 | +0.98 | 0.963 | 49.1% | +20 | — | -32 | 40.0% | -0.60 | 1–6 (14%) | 4–2 (67%) | 98.5 | -0.30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2022 | 1641 | 121.6 | -1.08 | -0.79 | 0.927 | 48.5% | -25 | — | +28 | 44.6% | -0.58 | 6–3 (67%) | 4–2 (67%) | 106.8 | -0.26 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2023 | 1673 | 121.1 | +0.21 | -0.20 | 1.051 | 50.6% | -53 | — | +76 | 42.9% | -0.05 | 4–4 (50%) | 2–6 (25%) | 97.2 | -0.47 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 2024 | 1694 | 120.8 | -2.60 | +0.53 | 0.929 | 48.5% | -24 | -300 | +129 | 44.6% | -0.30 | 5–5 (50%) | 3–5 (38%) | 99.1 | -0.39 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2025 | 1529 | 105.6 | -3.52 | -1.39 | 0.837 | 45.7% | +24 | — | — | 25.0% | -2.25 | 1–3 (25%) | 1–0 | — | +0.15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2026 | 1618 | 116.2 | -2.26 | -0.61 | 0.848 | 46.6% | +45 | — | +3 | 34.6% | -1.23 | 3–3 (50%) | 1–1 | — | +0.53 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1730 | 119.6 | -1.73 | -0.60 | 0.905 | 47.9% | -13 | -300 | +52 | 38.7% | -0.87 | 26–28 (48%) | 19–17 (53%) | 102.9 | -0.73 | — | 1580 | 107.6 | +0.64 | +1.34 | 0.955 | 48.9% | +18 | — | — | 50.0% | +0.30 | 1–1 | 1–1 | — | +2.75 |
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 |
|---|---|---|---|---|---|
| Jil Teichmann | 1 | 2 | 3 | Jan 28, 2025 | H2H |
| Yulia Putintseva | 0 | 3 | 3 | Aug 15, 2024 | H2H |
| Katie Boulter | 1 | 2 | 3 | Jul 4, 2024 | H2H |
| Nuria Parrizas Diaz | 2 | 1 | 3 | Feb 10, 2024 | H2H |
| Marie Bouzkova | 1 | 1 | 2 | Sep 3, 2026 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Emma Raducanu | 0 | 1 | 1 | Mar 19, 2025 | H2H |
| Diana Shnaider | 0 | 1 | 1 | Oct 26, 2024 | H2H |
| Zeynep Sonmez | 1 | 0 | 1 | Oct 25, 2024 | H2H |
| Sara Saito | 1 | 0 | 1 | Oct 24, 2024 | H2H |
| Katerina Siniakova | 0 | 1 | 1 | Aug 21, 2024 | H2H |