ATP tennis predict — Tom Gentzsch vs Jan Kumstat

Challenger Clay Bunschoten challenger · SF

Predicted probability

Tom Gentzsch

Germany

51.60%

Jan Kumstat

Czech Republic

48.40%

Average Odds

1.71 / 2.05

Market probability

54.52% / 45.48%

Why This Prediction?

This is a very close match — there is no significant statistical edge for either player.

Player Comparison

1663.2 Elo 1687.0

1708.0 Elo (surface) 1711.5

51 Wins (Challenger) 13

29 Wins (surface) 10

11 Last 15 form 10

0 Head-to-head wins 0

1.136 Dominance ratio 1.148

212 Rank 612

22.9 Age 19.5

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.

Tom Gentzsch

Heavy favorite (odds below 1.30) 2W–1L · 66.7%

Favorite (odds 1.30-1.80) 11W–4L · 73.3%

Even match (odds 1.80-2.20) 2W–3L · 40.0%

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

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

26 matches with market odds since 2026-06-02.

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.

Tom Gentzsch Jan Kumstat

1st Serve In %

62.9%

—

1st Serve Points Won %

71.6%

—

2nd Serve Points Won %

49.2%

—

Return Points Won vs 1st Serve %

23.6%

—

Return Points Won vs 2nd Serve %

50.0%

—

Aces per Service Game

0.45

—

Double Faults per Service Game

0.26

—

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

1st Serve In %

64.0%

56.9%

1st Serve Points Won %

72.2%

70.6%

2nd Serve Points Won %

45.3%

52.0%

Return Points Won vs 1st Serve %

29.0%

23.5%

Return Points Won vs 2nd Serve %

48.0%

44.9%

Aces per Service Game

0.46

0.59

Double Faults per Service Game

0.28

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.

Tom Gentzsch Jan Kumstat

Break Points Saved %

51.4%

—

Break Points Converted %

44.4%

—

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

Break Points Saved %

60.7%

61.5%

Break Points Converted %

43.8%

28.3%

Based on each player's last 10 Challenger matches.

Head-to-Head

Tom Gentzsch 0 – 0 Jan Kumstat

Clay Bunschoten challenger · 2026-07-18

SF

Tom Gentzsch #212

Jan Kumstat #612

7-5 6-4

7 Aces 5

5 Double Faults 1

67 Service Points 62

42 First Serve In 35

35 First Serve Won 25

9 Second Serve Won 14

1 Break Points Saved 1

2 Break Points Faced 4

- Winners -

- Unforced Errors -

1.7 Average Odds 2.0

Tom Gentzsch vs Jan Kumstat — Prediction