Czech Republic
| Age | 19 (02-01-2007) |
| Country | Czech Republic |
| Birthplace | Prostejov |
| Height | 196 |
| Weight | 83 |
| Plays | Right-Handed |
| Backhand | Two-Handed |
| Favorite Surface |  Hard |
| Coach | |
| Turned Pro | |
| Player Status | Active |
Jan Kumstat Upcoming Matches
Match Stats
Hard
Clay
Grass
Indoor
All
Service Stats
| Aces / Game | 0.58 | 184 / 316 |
| DFs / Game | 0.24 | 75 / 316 |
| 1st Serve % | 59.7% | 1162 / 1948 |
| 1st Serve Win % | 71.3% | 828 / 1162 |
| 2nd Serve Win % | 51.8% | 407 / 786 |
| Service Points Win % | 63.4% | 1235 / 1948 |
Return Stats
| Opponent Aces / Game | 0.38 | 120 / 316 |
| Opponent Double Faults / Game | 0.25 | 80 / 316 |
| Opponent 1st Serve % | 62.2% | 1186 / 1908 |
| 1st Return Win % | 31.5% | 374 / 1186 |
| 2nd Return Win % | 47.5% | 343 / 722 |
| Return Points Win % | 37.6% | 717 / 1908 |
Break Points (Serve)
| Break Points Saved Per Game | 0.30 | 95 / 316 |
| Break Points Faced Per Game | 0.49 | 155 / 316 |
| Break Points Save % | 61.3% | 95 / 155 |
| Service Hold % | 81.0% | 256 / 316 |
Break Points (Rtn)
| Break Points Won Per Game | 0.22 | 68 / 316 |
| Opponent Break Points Per Game | 0.46 | 144 / 316 |
| BP Won % | 47.2% | 68 / 144 |
| Opp Hold % | 78.5% | 248 / 316 |
Jan Kumstat Past Matches
 | Bunschoten Challenger | |||||
16 Jul 2026 R2 |  | 6 7 6 4 6 4 | W |  | H2H 0-0 | |
14 Jul 2026 R1 | | 6 3 6 1 | W | | H2H 0-0 | |
13 Jul 2026 QF | | 6 3 6 3 | W | | H2H 0-0 | |
12 Jul 2026 Q1 | | 7 6 6 4 | W | | H2H 0-0 | |
Jan Kumstat Surface Summary
| year | All | hard | clay | indoor | grass |
| 2026 | 18-11 | 6-4 | 10-5 | 2-2 | 0-0 |
| 2025 | 24-18 | 7-7 | 17-9 | 0-2 | 0-0 |
| 2024 | 3-4 | 0-0 | 0-3 | 3-1 | 0-0 |
| 2023 | 0-1 | 0-0 | 0-1 | 0-0 | 0-0 |
| 2022 | 0-3 | 0-0 | 0-2 | 0-1 | 0-0 |
Jan Kumstat Performance Breakdown
Tournament Level Breakdown
| Grand Slam | 0.0% | 0 / 0 |
| Masters | 0.0% | 0 / 0 |
| Main Tour | 0.0% | 0 / 0 |
| Cups | 0.0% | 0 / 0 |
| Challengers | 48.0% | 12 / 13 |
| Futures | 57.9% | 33 / 24 |
Opponent Rank Breakdown
| Vs No.1 | 0.0% | 0 / 0 |
| Vs Top.5 | 0.0% | 0 / 0 |
| Vs Top.10 | 0.0% | 0 / 0 |
| Vs Top.20 | 0.0% | 0 / 0 |
| Vs Top.50 | 0.0% | 0 / 0 |
| Vs Top.100 | 0.0% | 0 / 0 |
Surface Breakdown
| Overall | 55.6% | 45 / 36 |
| Hard | 54.2% | 13 / 11 |
| Clay | 57.4% | 27 / 20 |
| Indoor | 50.0% | 5 / 5 |
| Grass | 0.0% | 0 / 0 |
Round Breakdown
| Final | 0.0% | 0 / 3 |
| Semi-Final | 60.0% | 3 / 2 |
| Quarter-Final | 62.5% | 5 / 3 |
| Second | 52.9% | 9 / 8 |
| First | 50.0% | 17 / 17 |
| Qualifying Final | 100.0% | 6 / 0 |
| Qualifying R2 | 100.0% | 1 / 0 |
| Qualifying R1 | 50.0% | 4 / 4 |
Jan Kumstat Titles/Finals/Semis 
Title
Finals
Jan Kumstat interesting Heads to Heads
 Jan Kumstat | Draw VIEW H2H |  Mirza Basic | ||
Jan Kumstat | Draw VIEW H2H |  Yannick Hanfmann | ||
Jan Kumstat | Draw VIEW H2H |  Ji Sung Nam | ||
Jan Kumstat | Draw VIEW H2H |  Dominik Kellovsky | ||
Jan Kumstat | Draw VIEW H2H |  Vitaliy Sachko | ||
Jan Kumstat | Draw VIEW H2H |  Michael Geerts | ||
Jan Kumstat | Draw VIEW H2H |  Kai Wehnelt | ||
Jan Kumstat | Draw VIEW H2H |  Sergi Perez Contri | ||
Jan Kumstat | Draw VIEW H2H |  Corentin Denolly | ||
Jan Kumstat | Draw VIEW H2H |  Alexander Weis | ||
Jan Kumstat | Draw VIEW H2H |  Oleg Prihodko | ||
Jan Kumstat | Draw VIEW H2H |  Vladimir Nikolenko | ||
Upcoming Tennis Predictions & Head to Heads
Berkieta Barsukov Prediction H2H (0-0)
Nijboer Ouden Prediction H2H (0-1)
Bocchi Fumagalli Prediction H2H (0-1)
Harazaki Jin Prediction H2H (0-0)
Dzumhur Molcan Prediction H2H (1-2)
Kumstat Boogaard Prediction H2H (1-0)
Vincent Marysko Lasse Poertner Prediction H2H (1-1)
 ATP Rankings | |||
|---|---|---|---|
| 1 | 13450 PTS | ||
| 2 | 8480 PTS | ||
| 3 | 8160 PTS | ||
| 4 | 4740 PTS | ||
| 5 | 4110 PTS | ||
| 6 | 3770 PTS | ||
| 7 | 3760 PTS | ||
| 8 | 3670 PTS | ||
| 9 | 3460 PTS | ||
| 10 | 3365 PTS | ||
 Live Tennis Events | |||
|---|---|---|---|
 | EFG Swiss Open - Gstaad Switzerland | ||
 | Nordea Open - Bastad Sweden | ||
 | Plava Laguna Croatia Open - Umag Croatia | ||
 | Bunschoten Challenger Netherlands | ||
 | Cordenons Challenger Italy | ||
 | Granby Challenger Canada | ||
 | Lincoln Challenger United States | ||
 | Pozoblanco Challenger Spain | ||
 | M15 Castelo Branco Portugal | ||
| M15 Gubbio Italy | ||
 | M15 Kursumlijska Banja Serbia | ||
 | M15 Monastir Tunisia | ||
 | M15 Nova Gorica Slovenia | ||
| M15 Rochester United States | ||
 | M15 Slobozia Romania | ||
 | M15 Uslar Germany | ||
 | M15 Villa Constitucion Argentina | ||
 | M15 Wuning China | ||
| M25 Gandia Spain | ||
 | M25 Hillcrest South Africa | ||
 | M25 Kramsach Austria | ||
| M25 Louisville United States | ||
 | M25 Uriage France | ||
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