Ayumi Koshiishi: Ranking, Schedule & Stats
Ayumi Koshiishi is a professional tennis player from Japan, born 28 July 2000. The Japanese competes on the WTA Tour.
This page tracks Ayumi Koshiishi'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 season2026Ratings & strengths
Umpiry ratings · updated dailyRanking & projection
WTA ranking · not EloWTA · not EloRecent results
Last 1Beyond today · rivals & careerBeyond today
Rivals
Most meetings
Most-played rivals. The record is Koshiishi's wins–losses across all matches we have, qualifying excluded.
Season
Completed seasonResults
Season breakdown
2025 · by level, surface, opponent, sets2025Career
Career overview
More career statistics
Career serve & return
Absolute totals across the 2 matches we have on record. Green is Koshiishi, grey is the same stat by the players they faced.
Aces
| Koshiishi | 831 |
|---|---|
| Opponents | 252 |
Double faults
| Koshiishi | 1,349 |
|---|---|
| Opponents | 1,132 |
1st serve in
| Koshiishi | 60% 13,799 / 22,948 |
|---|---|
| Opponents | 65% 14,788 / 22,762 |
1st-serve points won
| Koshiishi | 62% 8,489 / 13,799 |
|---|---|
| Opponents | 56% 8,349 / 14,788 |
Break points converted
| Koshiishi | 50% 1,546 / 3,112 |
|---|---|
| Opponents | 48% 1,330 / 2,783 |
Break points saved
| Koshiishi | 52% 1,453 / 2,783 |
|---|---|
| Opponents | 50% 1,566 / 3,112 |
1st-serve points won by season
| Season | Koshiishi | Opponents |
|---|---|---|
| 2025 | 59% | 59% |
| 2024 | 61% | 56% |
| 2023 | 63% | 54% |
| 2022 | 66% | 57% |
| 2021 | 69% | 56% |
| 2020 | 58% | 54% |
| 2019 | 58% | 57% |
| Career | 62% | 56% |
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 |
|---|---|---|---|
| ITF / Futures | 145–92 | 61% | 8 |
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.
2025 season · 33–30 · W–L 52% · 63 matches
Round played
| Qualifying | 10–13 (43%) |
|---|---|
| R32 | 15–10 (60%) |
| R16 | 8–7 (53%) |
Surface
| Hard | 30–26 (54%) |
|---|---|
| Hard (indoor) | 3–4 (43%) |
Tournament level
| Challenger | 33–30 (52%) |
|---|
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 |
|---|---|---|---|---|---|
| 2025 | 30–26 | · | · | 3–4 | 33–30 |
| 2024 | 34–23 | 1–1 | · | 10–7 | 45–31 |
| 2023 | 48–17 | · | · | 1–3 | 49–20 |
| 2022 | 15–8 | · | · | 4–4 | 19–12 |
| 2021 | 41–10 | 4–4 | · | 3–1 | 48–15 |
| 2020 | 9–4 | 16–5 | · | · | 25–9 |
| 2019 | 13–13 | 5–5 | · | 4–5 | 22–23 |
| 2018 | 23–18 | · | · | 7–3 | 30–21 |
| 2017 | 7–5 | · | · | 6–7 | 13–12 |
| 2016 | 1–3 | · | · | 9–4 | 10–7 |
| Career | 221–127 64% | 26–15 63% | · | 47–38 55% | 294–180 62% |
More on Umpiry · discovery
Frequently asked · Ayumi KoshiishiFrequently asked
When was Ayumi Koshiishi born?
Ayumi Koshiishi was born on 28 July 2000 (26 years old).
Where is Ayumi Koshiishi from?
Ayumi Koshiishi is from Japan.
Cite this
Ayumi Koshiishi is ranked No. 882 in the WTA singles rankings with 31 points. Umpiry, "Ayumi Koshiishi: Ranking, Schedule & Stats", https://umpiry.com/players/ayumi-koshiishi-jpn?utm_source=cite (as of 17 November 2025).