N. Koizumi: Ranking, Schedule & Stats
N. Koizumi is a professional tennis player from Japan, born 11 June 2003.
This page tracks N. Koizumi'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 dailySurface performanceSurfaces
2026 seasonLast 12 monthsCareerRecent results
Last 1Beyond today · rivals & careerBeyond today
Rivals
Most meetings
Most-played rivals. The record is Koizumi'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 1 matches we have on record. Green is Koizumi, grey is the same stat by the players they faced.
1st-serve points won by season
| Season | Koizumi | Opponents |
|---|---|---|
| 2026 | 61% | 67% |
| 2025 | 58% | 66% |
| 2024 | 57% | 69% |
| Career | 59% | 67% |
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 | 10–10 | 50% | 0 |
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 · 29–16 · W–L 64% · 45 matches
Round played
| Qualifying | 3–2 (60%) |
|---|---|
| R32 | 5–1 (83%) |
| R16 | 2–3 (40%) |
| SF | 0–1 (0%) |
Surface
| Hard | 28–15 (65%) |
|---|---|
| Clay | 1–1 (50%) |
Tournament level
| Challenger | 0–1 (0%) |
|---|---|
| ITF / Futures | 29–15 (66%) |
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 | 29–14 | 1–1 | · | · | 30–15 |
| 2025 | 4–5 | 3–1 | · | · | 7–6 |
| 2024 | 1–2 | 8–6 | · | · | 9–8 |
| 2023 | 1–2 | · | · | · | 1–2 |
| Career | 35–23 60% | 12–8 60% | · | · | 47–31 60% |
More on Umpiry · discovery
Frequently asked · N. KoizumiFrequently asked
When was N. Koizumi born?
N. Koizumi was born on 11 June 2003 (23 years old).
Where is N. Koizumi from?
N. Koizumi is from Japan.