ATP tennis predict — Zdenek Kolar vs Jan Kumstat

Challenger Clay Liberec challenger · 1. round

Predicted probability

Zdenek Kolar

Czech Republic

40.91%

Jan Kumstat

Czech Republic

59.09%

Average Odds

1.75 / 1.98

Market probability

53.08% / 46.92%

Why This Prediction?

Jan Kumstat is the favorite because he has a higher Elo rating on clay courts (1675 vs 1632), a higher Elo rating (1653 vs 1607) and a stronger serve (64.1% vs 54.8% of service points won).

Player Comparison

1607.1 Elo 1652.7

1631.8 Elo (surface) 1675.5

269 Wins (Challenger) 13

188 Wins (surface) 10

8 Last 15 form 10

0 Head-to-head wins 0

0.932 Dominance ratio 1.027

132 Rank 706

29.8 Age 19.6

right Hand right

Performance vs. the Odds

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

Zdenek Kolar

Heavy favorite (odds below 1.30) 3W–0L · 100.0%

Favorite (odds 1.30-1.80) 2W–6L · 25.0%

Even match (odds 1.80-2.20) 1W–1L · 50.0%

Underdog (odds 2.20-4.00) 2W–3L · 40.0%

Heavy underdog (odds above 4.00) 0W–2L · 0.0%

20 matches with market odds since 2026-05-26.

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.

Zdenek Kolar Jan Kumstat

1st Serve In %

61.5%

—

1st Serve Points Won %

66.2%

—

2nd Serve Points Won %

52.0%

—

Return Points Won vs 1st Serve %

28.4%

—

Return Points Won vs 2nd Serve %

45.4%

—

Aces per Service Game

0.35

—

Double Faults per Service Game

0.32

—

Based on each player's last 10 ATP/Grand Slam matches.

1st Serve In %

54.5%

56.9%

1st Serve Points Won %

65.7%

70.6%

2nd Serve Points Won %

58.2%

52.0%

Return Points Won vs 1st Serve %

40.1%

23.5%

Return Points Won vs 2nd Serve %

53.6%

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.

Zdenek Kolar Jan Kumstat

Break Points Saved %

52.4%

—

Break Points Converted %

33.9%

—

Based on each player's last 10 ATP/Grand Slam matches.

Break Points Saved %

60.3%

61.5%

Break Points Converted %

47.1%

28.3%

Based on each player's last 10 Challenger matches.

Head-to-Head

Zdenek Kolar 0 – 0 Jan Kumstat

Clay Liberec challenger · 2026-07-27

1. round

Jan Kumstat #508

Zdenek Kolar #154

6-2 4-6 6-3

3 Aces 11

8 Double Faults 5

106 Service Points 87

63 First Serve In 38

39 First Serve Won 30

22 Second Serve Won 32

9 Break Points Saved 4

12 Break Points Faced 5

- Winners -

- Unforced Errors -

2.0 Average Odds 1.8

Zdenek Kolar vs Jan Kumstat — Prediction