ATP tennis predict — Petr Brunclik vs Jan Kumstat

Challenger Clay Prague 2 challenger · 1. round 13:00

Predicted probability

Petr Brunclik

Czech Republic

25.47%

Jan Kumstat

Czech Republic

74.53%

Average Odds

2.13 / 1.65

Market probability

43.65% / 56.35%

Why This Prediction?

Jan Kumstat is the favorite because he has a higher Elo rating (1878 vs 1618), a higher Elo rating on clay courts (1912 vs 1581) and a stronger serve (68.2% vs 63.2% of service points won).

Player Comparison

1618.1 Elo 1878.4

1581.5 Elo (surface) 1912.4

41 Wins (Challenger) 25

17 Wins (surface) 20

9 Last 15 form 14

0 Head-to-head wins 0

0.968 Dominance ratio 1.159

332 Rank 347

20.1 Age 19.6

left Hand right

Performance vs. the Odds

Career record grouped by how big a favorite the market made each player, based on their average odds.

Petr Brunclik

Heavy favorite (odds below 1.30) 1W–0L · 100.0%

Favorite (odds 1.30-1.80) 4W–3L · 57.1%

Even match (odds 1.80-2.20) 0W–4L · 0.0%

Underdog (odds 2.20-4.00) 0W–1L · 0.0%

Heavy underdog (odds above 4.00) 0W–0L · 0.0%

13 matches with market odds since 2026-06-09.

Jan Kumstat

Heavy favorite (odds below 1.30) 3W–1L · 75.0%

Favorite (odds 1.30-1.80) 15W–1L · 93.8%

Even match (odds 1.80-2.20) 4W–1L · 80.0%

Underdog (odds 2.20-4.00) 2W–1L · 66.7%

Heavy underdog (odds above 4.00) 0W–0L · 0.0%

28 matches with market odds since 2026-05-31.

Serve & Return

Serve and return win rates from each player's last 10 matches at the selected level.

Petr Brunclik Jan Kumstat

Not enough ATP/Grand Slam match history yet.

1st Serve In %

59.8%

56.9%

1st Serve Points Won %

71.7%

70.6%

2nd Serve Points Won %

50.4%

52.0%

Return Points Won vs 1st Serve %

31.6%

23.5%

Return Points Won vs 2nd Serve %

52.5%

44.9%

Aces per Service Game

0.35

0.59

Double Faults per Service Game

0.31

0.37

Based on each player's last 10 Challenger matches.

Break Point Performance

How each player handles the biggest points - break points saved serving, and converted returning - from their last 10 matches at the selected level.

Petr Brunclik Jan Kumstat

Not enough ATP/Grand Slam match history yet.

Break Points Saved %

65.7%

61.5%

Break Points Converted %

45.2%

28.3%

Based on each player's last 10 Challenger matches.

Head-to-Head

Petr Brunclik 0 – 0 Jan Kumstat

Clay Prague 2 challenger · 2026-08-18

1. round

Jan Kumstat #347

Petr Brunclik #332

7-5 6-1

6 Aces 10

6 Double Faults 4

52 Service Points 72

29 First Serve In 38

19 First Serve Won 34

12 Second Serve Won 17

2 Break Points Saved 7

5 Break Points Faced 7

- Winners -

- Unforced Errors -

1.6 Average Odds 2.1

Petr Brunclik vs Jan Kumstat — Prediction