Jan Kumstat: Ranking, Schedule & Stats
Jan Kumstat is a professional tennis player from Czechia, born 2 January 2007. The Czech competes on the ATP Tour and plays right-handed. Among ATP players under 20, Kumstat is ranked No. 4. The Czech was born in Prostějov.
This page tracks Jan Kumstat'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 season2026Kumstat has won 22 of the last 30 first sets
Kumstat has won 9 of 10 deciding sets
Kumstat has won 72% of matches on clay
Kumstat has won 3 titles in 2026
Ratings & strengths
Umpiry ratings · updated dailySurface performanceSurfaces
2026 seasonLast 12 monthsCareerMost matches this season came on clay: 25–4.
Clay is the clear edge: 5 losses in 30 matches over the last 12 months.
Clay is the clear edge: 11 losses in 39 matches across the career.
Ranking & projection
ATP ranking · not EloATP · not EloRecent results
Last 5Beyond today · rivals & careerBeyond today
Rivals
Most meetings
Most-played rivals. The record is Kumstat's wins–losses across all matches we have, qualifying excluded.
Season
Current seasonResults
Season breakdown
2026 · by level, surface, opponent, sets2026Career
Career overview
Titles & finals
3 finals · 3 titles · 0 lostNo ATP tour-level final on record for Jan Kumstat — either they have not reached one, or we do not have it in our data.
More career statistics
Career serve & return
Absolute totals across the 45 matches we have on record. Green is Kumstat, grey is the same stat by the players they faced.
Aces
| Kumstat | 567 |
|---|---|
| Opponents | 341 |
Double faults
| Kumstat | 251 |
|---|---|
| Opponents | 327 |
1st serve in
| Kumstat | 56% 3,695 / 6,588 |
|---|---|
| Opponents | 61% 4,166 / 6,842 |
1st-serve points won
| Kumstat | 73% 2,692 / 3,695 |
|---|---|
| Opponents | 68% 2,821 / 4,166 |
Break points converted
| Kumstat | 40% 263 / 665 |
|---|---|
| Opponents | 41% 236 / 577 |
Break points saved
| Kumstat | 59% 341 / 577 |
|---|---|
| Opponents | 60% 402 / 665 |
1st-serve points won by season
| Season | Kumstat | Opponents |
|---|---|---|
| 2026 | 77% | 68% |
| 2025 | 72% | 67% |
| 2024 | 70% | 76% |
| Career | 73% | 68% |
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 |
|---|---|---|---|
| Challenger | 21–11 | 66% | 0 |
| ITF / Futures | 22–19 | 54% | 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 · 37–14 · W–L 73% · 51 matches
Round played
| Qualifying | 11–3 (79%) |
|---|---|
| R32 | 7–3 (70%) |
| R16 | 6–1 (86%) |
| SF | 3–1 (75%) |
| F | 3–0 (100%) |
Surface
| Hard | 6–4 (60%) |
|---|---|
| Hard (indoor) | 2–2 (50%) |
| Clay | 29–8 (78%) |
Tournament level
| Challenger | 24–4 (86%) |
|---|---|
| ITF / Futures | 13–10 (57%) |
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 | 6–4 | 29–8 | · | 2–2 | 37–14 |
| 2025 | 7–7 | 17–9 | · | 0–2 | 24–18 |
| 2024 | · | 0–3 | · | 3–1 | 3–4 |
| 2023 | · | 0–1 | · | · | 0–1 |
| 2022 | · | 0–2 | · | 0–1 | 0–3 |
| Career | 13–11 54% | 46–23 67% | · | 5–6 45% | 64–40 62% |
Record at one tournament
Every edition entered: year, best round reached, wins and losses. Most recent first.
Prague · Editions 3 · Record 7–2 · Titles 1
| Year | Best round | W | L |
|---|---|---|---|
| 2026 | Title | 5 | 0 |
| 2025 | Round 1 | 2 | 1 |
| 2024 | Round 1 | 0 | 1 |
More on Umpiry · discovery
More players from Czechia
All →Frequently asked · Jan KumstatFrequently asked
When was Jan Kumstat born?
Jan Kumstat was born on 2 January 2007 (19 years old).
Where is Jan Kumstat from?
Jan Kumstat is from Czechia, born in Prostějov on 2 January 2007.
Is Jan Kumstat right or left-handed?
Jan Kumstat plays right-handed.
How good is Jan Kumstat on clay?
On clay, Jan Kumstat has compiled a 28-11 record (72% wins).
Cite this
Jan Kumstat is ranked No. 191 in the ATP singles rankings with 302 points. Umpiry, "Jan Kumstat: Ranking, Schedule & Stats", https://umpiry.com/players/jan-kumstat-cze?utm_source=cite (as of 31 August 2026).