JK
ATP · Rank #187
ATP · Rank #187
Jan Kumstat
19yrs
1.96 m
83 kg
Right
#508Peak Rank
75%Accuracy
48
Matches Analyzed
Recent Form
LWWWW
Recent & Upcoming
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C. Tseng vs J. Kumstat, Challenger - Prague, Czech Republic, 13:00, Finished. Match winner odds: 3.05 for C. Tseng, 1.41 for J. Kumstat. AI winner pick: J. Kumstat, odds 1.41, confidence 4.2 out of 10. This tip won. Predicted score: 6-4, 3-6, 2-6. Best AI tip: J. Kumstat, odds 1.41, confidence 4.2 out of 10. This tip won.
C. Tseng
J. Kumstat
J. Kumstat vs F. Jianu, Challenger - Prague, Czech Republic, 13:15, Finished. Match winner odds: 1.29 for J. Kumstat, 3.55 for F. Jianu. AI winner pick: J. Kumstat, odds 1.29, confidence 4.3 out of 10. This tip won. Predicted score: 6-3, 6-4. Best AI tip: J. Kumstat, odds 1.29, confidence 4.3 out of 10. This tip won.
J. Kumstat
F. Jianu
M. Mrva vs J. Kumstat, Challenger - Prague, Czech Republic, 15:25, Finished. Match winner odds: 2.02 for M. Mrva, 1.83 for J. Kumstat. AI winner pick: J. Kumstat, odds 1.83, confidence 3.2 out of 10. This tip won. Predicted score: 4-6, 3-6. Best AI tip: J. Kumstat, odds 1.83, confidence 3.2 out of 10. This tip won.
M. Mrva
J. Kumstat
J. Kumstat vs S. Nagal, Challenger - Prague, Czech Republic, 10:45, Finished. Match winner odds: 1.5 for J. Kumstat, 2.67 for S. Nagal. AI winner pick: S. Nagal, odds 2.67, confidence 1.0 out of 10. This tip lost. Predicted score: 4-6, 6-3, 3-6. Best AI tip: O19.5, odds 1.47, confidence 1.3 out of 10. This tip won.
J. Kumstat
S. Nagal
(4)
P. Brunclik vs J. Kumstat, Challenger - Prague, Czech Republic, 13:15, Finished. Match winner odds: 2.22 for P. Brunclik, 1.68 for J. Kumstat. AI winner pick: J. Kumstat, odds 1.68, confidence 5.8 out of 10. This tip won. Predicted score: 6-2, 3-6, 3-6. Best AI tip: J. Kumstat, odds 1.68, confidence 5.8 out of 10. This tip won.
P. Brunclik
J. Kumstat
13:00
Finished
1300
C. Tseng
J. Kumstat
1
2
▴3.05
▾1.41
2
▾1.41
643626
2
▾1.41
4.2/10
13:15
Finished
1315
J. Kumstat
F. Jianu
2
0
▾1.29
▴3.55
1
▾1.29
6364
1
▾1.29
4.3/10
15:25
Finished
1525
M. Mrva
J. Kumstat
0
2
▴2.02
▾1.83
2
▾1.83
4636
2
▾1.83
3.2/10
10:45
Finished
1045
J. Kumstat
S. Nagal
(4) 2
0
1.5
2.67
2
2.67
466336
O19.5
▴1.47
1.3/10
13:15
Finished
1315
P. Brunclik
J. Kumstat
0
2
▾2.22
▴1.68
2
▴1.68
623636
2
▴1.68
5.8/10
J. Kumstat vs M. Möller, Challenger - Hamburg, Germany, 12:40, Finished. Match winner odds: 1.6 for J. Kumstat, 2.35 for M. Möller. AI winner pick: M. Möller, odds 2.35, confidence 1.5 out of 10. This tip lost. Predicted score: 2-6, 6-3, 4-6. Best AI tip: O18.5, odds 1.4, confidence 4.6 out of 10. This tip won.
J. Kumstat
(Q)
M. Möller
(A)
M. Pucinelli de vs J. Kumstat, Challenger - Hamburg, Germany, 13:15, Finished. Match winner odds: 2.63 for M. Pucinelli de, 1.51 for J. Kumstat. AI winner pick: J. Kumstat, odds 1.51, confidence 5.9 out of 10. This tip won. Predicted score: 4-6, 6-3, 3-6. Best AI tip: J. Kumstat, odds 1.51, confidence 5.9 out of 10. This tip won.
M. Pucinelli de
J. Kumstat
(Q)
C. Taberner vs J. Kumstat, Challenger - Hamburg, Germany, 13:40, Finished. Match winner odds: 2.35 for C. Taberner, 1.66 for J. Kumstat. AI winner pick: J. Kumstat, odds 1.66, confidence 3.1 out of 10. This tip won. Predicted score: 6-7, 4-6. Best AI tip: O18.5, odds 1.26, confidence 3.3 out of 10. This tip lost.
C. Taberner
J. Kumstat
(Q)
J. Kumstat vs M. Houkes, Challenger - Hamburg, Germany, 09:30, Finished. Match winner odds: 1.75 for J. Kumstat, 2.22 for M. Houkes. AI winner pick: J. Kumstat, odds 1.75, confidence 4.4 out of 10. This tip won. Predicted score: 6-3, 4-6, 6-3. Best AI tip: J. Kumstat, odds 1.75, confidence 4.4 out of 10. This tip won.
J. Kumstat
(Q)
M. Houkes
J. Mackenzie vs J. Kumstat, Challenger - Hamburg, Germany, 15:20, Finished. Match winner odds: 2.52 for J. Mackenzie, 1.56 for J. Kumstat. AI winner pick: J. Kumstat, odds 1.56, confidence 3.3 out of 10. This tip won. Predicted score: 3-6, 4-6. Best AI tip: J. Kumstat, odds 1.56, confidence 3.3 out of 10. This tip won.
J. Mackenzie
(WC)
J. Kumstat
J. Kumstat vs T. Zeuch, Challenger - Hamburg, Germany, Qualifying, 09:30, Finished. Match winner odds: 1.06 for J. Kumstat, 8 for T. Zeuch. AI winner pick: J. Kumstat, odds 1.06, confidence 6.6 out of 10. This tip won. Predicted score: 7-5, 6-2. Best AI tip: 2:0, odds 1.18, confidence 6.6 out of 10. This tip lost.
J. Kumstat
T. Zeuch
J. Kumstat vs A. Wazny, Challenger - Hamburg, Germany, Qualifying, 09:30, Finished. Match winner odds: 1.09 for J. Kumstat, 6.5 for A. Wazny. AI winner pick: J. Kumstat, odds 1.09, confidence 3.8 out of 10. This tip won. Predicted score: 4-6, 6-4, 6-3. Best AI tip: J. Kumstat, odds 1.09, confidence 3.8 out of 10. This tip won.
J. Kumstat
A. Wazny
12:40
Finished
1240
J. Kumstat
(Q)
M. Möller
(A) 2
1
▴1.6
▾2.35
2
▾2.35
266346
O18.5
▾1.4
4.6/10
13:15
Finished
1315
M. Pucinelli de
J. Kumstat
(Q) 1
2
▴2.63
▾1.51
2
▾1.51
466336
2
▾1.51
5.9/10
13:40
Finished
1340
C. Taberner
J. Kumstat
(Q) 0
2
▴2.35
▾1.66
2
▾1.66
6746
O18.5
▾1.26
3.3/10
09:30
Finished
0930
J. Kumstat
(Q)
M. Houkes
2
0
▴1.75
▾2.22
1
▴1.75
634663
1
▴1.75
4.4/10
15:20
Finished
1520
J. Mackenzie
(WC)
J. Kumstat
1
2
▾2.52
▴1.56
2
▴1.56
3646
2
▴1.56
3.3/10
09:30
Finished
0930
J. Kumstat
T. Zeuch
2
1
▾1.06
▴8
1
1.06
7562
2:0
▾1.18
6.6/10
09:30
Finished
0930
J. Kumstat
A. Wazny
2
0
▾1.09
▴6.5
1
▾1.09
466463
1
▾1.09
3.8/10
J. Kumstat vs G. Bueno, Challenger - Liberec, Czech Republic, 10:00, Finished. Match winner odds: 1.87 for J. Kumstat, 2.07 for G. Bueno. AI winner pick: J. Kumstat, odds 1.87, confidence 2.5 out of 10. This tip won. Predicted score: 6-3, 6-4. Best AI tip: O18.5, odds 1.29, confidence 2.9 out of 10. This tip lost.
J. Kumstat
(WC)
G. Bueno
(2)
J. Kumstat vs S. Nagal, Challenger - Liberec, Czech Republic, 10:50, Finished. Match winner odds: 1.81 for J. Kumstat, 2.05 for S. Nagal. AI winner pick: J. Kumstat, odds 1.81, confidence 6.1 out of 10. This tip won. Predicted score: 6-4, 6-3. Best AI tip: J. Kumstat, odds 1.81, confidence 6.1 out of 10. This tip won.
J. Kumstat
(WC)
S. Nagal
(7)
J. Kumstat vs F. Ferreira, Challenger - Liberec, Czech Republic, 10:00, Finished. Match winner odds: 1.59 for J. Kumstat, 2.35 for F. Ferreira. AI winner pick: J. Kumstat, odds 1.59, confidence 4.1 out of 10. This tip won. Predicted score: 6-3, 6-4. Best AI tip: J. Kumstat, odds 1.59, confidence 4.1 out of 10. This tip won.
J. Kumstat
(WC)
F. Ferreira
(8)
J. Kumstat vs T. Seyboth Wild, Challenger - Liberec, Czech Republic, 10:00, Finished. Match winner odds: 2.7 for J. Kumstat, 1.5 for T. Seyboth Wild. AI winner pick: J. Kumstat, odds 2.7, confidence 1.1 out of 10. This tip won. Predicted score: 3-6, 6-4, 6-3. Best AI tip: U24.5, odds 1.59, confidence 1.3 out of 10. This tip won.
J. Kumstat
(WC)
T. Seyboth Wild
Z. Kolar vs J. Kumstat, Challenger - Liberec, Czech Republic, 14:55, Finished. Match winner odds: 1.72 for Z. Kolar, 2.2 for J. Kumstat. AI winner pick: J. Kumstat, odds 2.2, confidence 3.0 out of 10. This tip won. Predicted score: 3-6, 4-6. Best AI tip: O19.5, odds 1.45, confidence 3.2 out of 10. This tip won.
Z. Kolar
J. Kumstat
10:00
Finished
1000
J. Kumstat
(WC)
G. Bueno
(2) 2
0
▾1.87
▴2.07
1
▾1.87
6364
O18.5
▾1.29
2.9/10
10:50
Finished
1050
J. Kumstat
(WC)
S. Nagal
(7) 2
0
▾1.81
▴2.05
1
▾1.81
6463
1
▾1.81
6.1/10
10:00
Finished
1000
J. Kumstat
(WC)
F. Ferreira
(8) 2
0
▾1.59
▴2.35
1
▾1.59
6364
1
▾1.59
4.1/10
10:00
Finished
1000
J. Kumstat
(WC)
T. Seyboth Wild
2
0
▴2.7
▾1.5
1
▴2.7
366463
U24.5
▴1.59
1.3/10
14:55
Finished
1455
Z. Kolar
J. Kumstat
1
2
▴1.72
▾2.2
2
▾2.2
3646
O19.5
1.45
3.2/10
J. Kumstat vs M. Erhard, ITF Men - M25 Ollersbach, 13:00, Finished. Match winner odds: 1.98 for J. Kumstat, 1.85 for M. Erhard. AI winner pick: J. Kumstat, odds 1.98, confidence 1.6 out of 10. This tip lost. Predicted score: 7-6, 6-4. Best AI tip: O21.5, odds 1.75, confidence 3.7 out of 10. This tip won.
J. Kumstat
M. Erhard
Y. Inui vs J. Kumstat, ITF Men - M25 Ollersbach, 11:09, Finished. Match winner odds: 10 for Y. Inui, 1.02 for J. Kumstat. AI winner pick: J. Kumstat, odds 1.02, confidence 6.5 out of 10. This tip won. Predicted score: 2-6, 3-6. Best AI tip: 0:2, odds 1.03, confidence 6.5 out of 10. This tip won.
Y. Inui
J. Kumstat
13:00
Finished
1300
J. Kumstat
M. Erhard
1
2
▾1.98
▴1.85
1
▾1.98
7664
O21.5
1.75
3.7/10
11:09
Finished
1109
Y. Inui
J. Kumstat
0
2
▾10
▴1.02
2
1.02
2636
0:2
1.03
6.5/10
Record by surface
Hard
9-6
Clay
26-8
Overall
35-14
Our AI on this player
36 correct of 48
From the matches in our database
Most-played opponents
Sumit Nagal
2 meetings
2-0
Marvin Möller
2 meetings
2-0
Thijs Boogaard
2 meetings
2-0
About Jan Kumstat
Jan Kumstat is a 19-year-old right-handed professional tennis player, currently ranked world No. 187. The first serve is the reliable part of the game: 57.4% of opening deliveries land in, and 77.8% of those points are won. Breaking is the real weapon here: 33.7% of break chances get taken. Across everything played, 60.4% of all points end up on this side of the net. The best surface is comfortably clay: 26-8 there, against 9-6 on everything else.
Right now the run is going well: 4 wins from the last 5 completed matches. The longest match we have on record ran to 35 games, against M. Möller. Predictions cover match winner and score, alongside serve, return and break-point statistics. Most recently seen in our data at Challenger Como Italy.
Serve & Return
First Serve %
54.3%
1st Serve Won
79.4%
2nd Serve Won
57.2%
Aces / Match
7.2
Double Faults / Match
2.3
Break Pts Saved
77.8%
Break Pts Converted
26.4%
Return Pts Won
39.2%
Service Hold %
69.3%
Total Pts Won
53.9%
Records
Last 12 months
3
Titles
4
Finals
7
Semis or better
22
Events played
Tournament Results
Liberec, Czech Republic
Challenger
Winner
Hamburg, Germany
Challenger
Winner
Prague, Czech Republic
Challenger
Winner
ITF M15 Heraklion Men
ITF
Final
Bunschoten, Netherlands
Challenger
Semi-Finals
ITF M25 Ceska Lipa Men
ITF
Semi-Finals
ITF M25 Pardubice Men
ITF
Semi-Finals
ITF M15 Monastir Men
ITF
Quarter-Finals
ITF M25 Ollersbach Men
ITF
Quarter-Finals
ITF M25 Pszczyna Men
ITF
Quarter-Finals
Athens, Greece Men Singles
Challenger
Round of 16
ITF M25 Klosters Men
ITF
Round of 16
Monastir, Tunisia
Challenger
Round of 16
ITF M15 Monastir 39 Men
ITF
Round of 32
ITF M15 Monastir Men 2
ITF
Round of 32
ITF M25 Heraklion 2 Men
ITF
Round of 32
ITF M25 Monastir 35 Men
ITF
Round of 32
ITF M25 Trento Men
ITF
Round of 32
ITF M25 Zagreb Men
ITF
Round of 32
Lyon (Decines-Charpieu), France
Challenger
Round of 32
Prostejov, Czech Republic
Challenger
Round of 32
Troyes, France
Challenger
Qualifying
Deepest runs first, not by date
Season by season
2026so far
24–3
Won-lost
27
Matches
5–4
Tiebreaks
8.3
Aces / Match
2.7
Double Faults / Match
First Serve %
58%
1st Serve Won
78.6%
2nd Serve Won
56.7%
Break points won
37.7%
Break Pts Saved
76.9%
2025
3–2
Won-lost
5
Matches
—
Tiebreaks
2.4
Aces / Match
4.2
Double Faults / Match
First Serve %
58.1%
1st Serve Won
55.9%
2nd Serve Won
24.6%
Break points won
37.5%
Break Pts Saved
47.7%
2024
0–3
Won-lost
3
Matches
—
Tiebreaks
2
Aces / Match
4.3
Double Faults / Match
First Serve %
44.7%
1st Serve Won
61.8%
2nd Serve Won
35.1%
Break points won
20%
Break Pts Saved
51.7%
Season totals from the tour feed, singles only. The won-lost line is the tour's own count and can differ from the record under Predictions, which counts the matches we cover. A dash means the season holds nothing to measure that figure from.
Frequently Asked Questions
How accurate are the AI predictions for Jan Kumstat?
+
Our model has graded 48 matches involving Jan Kumstat and got 36 right — a hit rate of 75%. The 20 most recent are listed below, each with the pick we made and how it finished.
Who has Jan Kumstat played most often?
+
Of the matches we cover, Jan Kumstat has met Sumit Nagal most often — 2 times, with a 2-0 record.