CZE · ATP #194JanKumstat
Age 19
Hard Elo1815
Last 106-4
Last 6
WWWWLL
Surface rating
Elo by courtHard181521-7
Clay16927-5
Grass2319STRONGEST
Serve and return
35 matches since May 2026Hold, break and tiebreak ratesMeasured from his own matches. Open to Plus members.
Unlock0 days since his last match · W vs Shimizu · Taipei
Career
2022 to Nov 2026Matches4016 events entered
Won-lost28-1270.0% of matches
Titles3from 3 finals
Best of fiveNoneNo Slam matches yet
By surface
Hard courts
21-7 · 75.0%
Clay courts
7-5 · 58.3%
By opponent ranking
vs 51+
26-12 · 68.4%
How far he gets
Finals3
Semi-finals4
Quarter-finals5
Last 166
Head to head
39 opponents · since 2020
Sumit Nagal#265 · last met Aug 2026
2-0
Harold Mayot#220 · last met Nov 2026
1-0
Billy Harris#232 · last met Nov 2026
1-0
36 more head-to-headsEvery opponent since 2020, with the record against each.
UnlockRecent matches
Last 5Nov 7
ShimizuTaipei · SF
2-0WNov 6
MayotTaipei · QF
2-1WNov 4
HarrisTaipei · R16
2-0WNov 2
SchwaerzlerTaipei · R32
2-1WOct 27
ShimabukuroSeoul · R32
0-2L15 more recent matchesScores and events for his last 20, by surface.
UnlockCareer, surface splits and recent matches count every result we hold since 2020: the match archive, then the results feeds. Serve, return and tiebreak rates count the last 52 weeks.