Sayaka Ishii: Ranking, Schedule & Stats
Sayaka Ishii is a professional tennis player from Japan, born 31 August 2005. The Japanese competes on the WTA Tour. The Japanese was born in Shibuya.
This page tracks Sayaka Ishii's upcoming schedule, latest results, recent form and surface record, with each match linking through to a detailed head-to-head and pre-match analysis. Scores update live as matches are played.
Current form
2026 season2026Ishii has won 12 of the last 29 first sets
Ishii has won 6 of 11 deciding sets
Ratings & strengths
Umpiry ratings · updated dailySurface performanceSurfaces
2026 seasonLast 12 monthsCareerWin rates are close across the career: hard 44%, grass 38%.
Ranking & projection
WTA ranking · not EloWTA · not EloRecent results
Last 5Beyond today · rivals & careerBeyond today
Rivals
Most meetings
Most-played rivals. The record is Ishii's wins–losses across all matches we have, qualifying excluded.
Season
Current seasonResults
Season breakdown
2026 · by level, surface, opponent, sets2026Career
Career overview
More career statistics
Career serve & return
Absolute totals across the 30 matches we have on record. Green is Ishii, grey is the same stat by the players they faced.
Aces
| Ishii | 377 |
|---|---|
| Opponents | 507 |
Double faults
| Ishii | 954 |
|---|---|
| Opponents | 819 |
1st serve in
| Ishii | 62% 8,818 / 14,333 |
|---|---|
| Opponents | 63% 8,919 / 14,239 |
1st-serve points won
| Ishii | 64% 5,625 / 8,818 |
|---|---|
| Opponents | 61% 5,406 / 8,919 |
Break points converted
| Ishii | 49% 837 / 1,701 |
|---|---|
| Opponents | 46% 750 / 1,635 |
Break points saved
| Ishii | 54% 885 / 1,635 |
|---|---|
| Opponents | 51% 864 / 1,701 |
1st-serve points won by season
| Season | Ishii | Opponents |
|---|---|---|
| 2026 | 64% | 61% |
| 2025 | 63% | 65% |
| 2024 | 66% | 61% |
| 2023 | 63% | 60% |
| 2022 | 59% | 55% |
| Career | 64% | 61% |
Counted from the match statistics we hold, season by season — the cards above are career totals from our data provider, so the two can differ by a few tenths. Seasons with fewer than three matches on record are left out.
Career win–loss by level
| Level | W–L | Win % | Titles |
|---|---|---|---|
| WTA 1000 | 0–1 | 0% | 0 |
| WTA 500 | 2–1 | 67% | 0 |
| WTA 250 | 0–1 | 0% | 0 |
| Tour level | 2–3 | 40% | 0 |
| Challenger | 2–3 | 40% | 0 |
| ITF / Futures | 76–62 | 55% | 1 |
Challenger and ITF matches are shown in grey and are not part of the tour-level total.
Season breakdown
Wins and losses in one season, split by round reached, surface, tournament level and opponent ranking band.
2026 season · 27–22 · W–L 55% · 49 matches
Round played
| Qualifying | 6–10 (38%) |
|---|---|
| R32 | 9–7 (56%) |
| R16 | 5–4 (56%) |
| SF | 0–1 (0%) |
Surface
| Hard | 19–15 (56%) |
|---|---|
| Hard (indoor) | 2–1 (67%) |
| Grass | 0–4 (0%) |
| Carpet | 6–2 (75%) |
Tournament level
| Grand Slam | 0–1 (0%) |
|---|---|
| Challenger | 24–19 (56%) |
| ITF / Futures | 3–2 (60%) |
Rounds are the round each match was played in, not a ladder: a player enters a 32-draw straight in R32, and team events (United Cup, Davis Cup) are not played through a draw at all — those have their own row. Ranking bands use the opponent's ranking on match day and are cumulative: top 100 includes top 10.
Surface record by season
Each cell is one season on one surface: the number is wins–losses, the colour is the win rate. Carpet is counted as indoor hard.
| Season | Hard | Clay | Grass | I.hard | Total |
|---|---|---|---|---|---|
| 2026 | 19–15 | · | 0–4 | 6–3 | 25–22 |
| 2025 | 7–9 | 0–1 | 5–4 | 5–2 | 17–16 |
| 2024 | 44–22 | 4–2 | · | · | 48–24 |
| 2023 | 20–11 | 10–7 | · | 1–2 | 31–20 |
| 2022 | 5–3 | 5–2 | 0–1 | 3–2 | 13–8 |
| Career | 95–60 61% | 19–12 61% | 5–9 36% | 15–9 63% | 134–90 60% |
Record at one tournament
Every edition entered: year, best round reached, wins and losses. Most recent first.
W35 Osaka · Editions 3 · Record 9–2 · Titles 1
Tournament page →| Year | Best round | W | L |
|---|---|---|---|
| 2026 | R16 | 3 | 1 |
| 2025 | Round 2 | 1 | 1 |
| 2024 | Title | 5 | 0 |
Season statistics
Each stat is stored as a value–count pair, so seasons can be added together and the rate is always value ÷ count.
2024–2025 · 4 games summed across the range
| Stat | Value | Count | Rate |
|---|---|---|---|
| Aces | 1 | 45.5 service games | 0.0 / game |
| Double faults | 19 | 45.5 service games | 0.4 / game |
| 1st serve in | 188 | 303 serve points | 62% |
| 1st-serve points won | 113 | 188 1st serves in | 60% |
| 2nd-serve points won | 52 | 115 2nd serves | 45% |
| Service points won | 165 | 303 serve points | 54% |
| Return points lost | 141 | 310 return points | 45% |
| Break points saved | 16 | 33 faced | 48% |
Value is what happened (aces hit, points won), count is how often it could (service games, points played). Adding seasons adds both — the rate is never averaged from percentages.
More on Umpiry · discovery
Frequently asked · Sayaka IshiiFrequently asked
When was Sayaka Ishii born?
Sayaka Ishii was born on 31 August 2005 (21 years old).
Where is Sayaka Ishii from?
Sayaka Ishii is from Japan, born in Shibuya on 31 August 2005.
Cite this
Sayaka Ishii is ranked No. 588 in the WTA singles rankings with 78 points. Umpiry, "Sayaka Ishii: Ranking, Schedule & Stats", https://umpiry.com/players/sayaka-ishii-jpn?utm_source=cite (as of 26 September 2026).