02 Jan 2007
Born
196 cm
Height
83 kg
Weight
right-handed
Plays
Prostejov, Czechia
Birthplace
$11,817
Prize money (season)
$32,854
Prize money (career)
Ranking trend
best #184Career record
38 matches29–9
Win–loss
50%
Hard · 5–5
86%
Clay · 24–4
—
Grass · 0–0
2025
11 matches · 6–5 · 54.5%| Surface | M | W | Titles | Aces | DF | 1st serve | BP conv. | Winners | UE | TB |
|---|---|---|---|---|---|---|---|---|---|---|
| Hardcourt Indoor | 1 | 0 | — | 3 | 3 | 65% | 100% | — | — | — |
| Hardcourt Outdoor | 5 | 3 | — | 35 | 11 | 75% | 44% | — | — | 0–1 |
| Red Clay | 5 | 3 | — | 12 | 21 | 56% | 38% | — | — | — |
2024
3 matches · 0–3 · 0.0%| Surface | M | W | Titles | Aces | DF | 1st serve | BP conv. | Winners | UE | TB |
|---|---|---|---|---|---|---|---|---|---|---|
| Red Clay | 3 | 0 | — | 6 | 13 | 62% | 20% | — | — | — |
M = matches · W = wins · DF = double faults · BP conv. = break points converted · UE = unforced errors · TB = tiebreaks won–lost.
01:50
Brisbane 3, Australia
hard
J. McCabe
J. Kumstat
W/O
FT
Taipei, Chinese Taipei Men Singles
hard
Y. Watanuki
(Q)
J. Kumstat
7
6
7
5
2
0
FT
Taipei, Chinese Taipei Men Singles
hard
Y. Shimizu
(Q)
J. Kumstat
5
7
4
6
0
2
FT
Taipei, Chinese Taipei Men Singles
hard
J. Kumstat
H. Mayot
3
6
7
6
6
4
2
1
FT
Taipei, Chinese Taipei Men Singles
hard
J. Kumstat
B. Harris
7
6
6
4
2
0
FT
Taipei, Chinese Taipei Men Singles
hard
J. Schwaerzler
(8)
J. Kumstat
5
7
6
3
6
7
1
2
FT
Seoul, South Korea
hard
S. Shimabukuro
(7)
J. Kumstat
6
4
6
0
2
0
FT
Lyon
hard
J. Kumstat
M. Mmoh
(7)
1
6
7
6
3
6
1
2
FT
Olbia, Italy
hard
J. Fearnley
(1)
J. Kumstat
6
4
6
3
2
0
FT
Olbia, Italy
hard
J. Kumstat
E. Butvilas
7
6
7
6
2
0
FT
Como, Italy
clay
J. Varillas
J. Kumstat
(4)
6
4
6
3
2
0
FT
Prague, Czech Republic
clay
C. Tseng
J. Kumstat
7
5
3
6
0
6
1
2
FT
Prague, Czech Republic
clay
J. Kumstat
F. Jianu
6
1
6
4
2
0
FT
Prague, Czech Republic
clay
M. Mrva
J. Kumstat
1
6
5
7
0
2
FT
Prague, Czech Republic
clay
J. Kumstat
S. Nagal
(4)
7
5
6
3
2
0
FT
Prague, Czech Republic
clay
P. Brunclik
J. Kumstat
5
7
1
6
0
2
FT
Hamburg, Germany
clay
J. Kumstat
(Q)
M. Möller
(A)
4
6
7
6
7
5
2
1
FT
Hamburg, Germany
clay
M. Pucinelli de Almeida
J. Kumstat
(Q)
4
6
7
5
2
6
1
2
FT
Hamburg, Germany
clay
C. Taberner
J. Kumstat
(Q)
5
7
0
0
0
1
FT
Hamburg, Germany
clay
J. Kumstat
(Q)
M. Houkes
6
4
7
6
2
0