ATP tennis predict — Jan Kumstat vs Filip Cristian Jianu

Challenger Clay Prague 2 challenger · SF 14:10

Predicted probability

Jan Kumstat

Czech Republic

80.70%

Filip Cristian Jianu

Romania

19.30%

Average Odds

1.30 / 3.33

Market probability

71.92% / 28.08%

Why This Prediction?

Jan Kumstat is the favorite because he has a higher Elo rating (1918 vs 1546), a higher Elo rating on clay courts (1950 vs 1572) and the advantage of playing in his home country.

Player Comparison

1918.2 Elo 1546.5

1950.0 Elo (surface) 1572.4

28 Wins (Challenger) 119

23 Wins (surface) 98

15 Last 15 form 6

0 Head-to-head wins 0

0.935 Dominance ratio 1.104

347 Rank 284

19.6 Age 24.9

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.

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.

Filip Cristian Jianu

Heavy favorite (odds below 1.30) 0W–0L · 0.0%

Favorite (odds 1.30-1.80) 1W–3L · 25.0%

Even match (odds 1.80-2.20) 1W–2L · 33.3%

Underdog (odds 2.20-4.00) 2W–5L · 28.6%

Heavy underdog (odds above 4.00) 0W–1L · 0.0%

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

Serve & Return

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

Jan Kumstat Filip Cristian Jianu

1st Serve In %

—

75.4%

1st Serve Points Won %

—

62.1%

2nd Serve Points Won %

—

44.7%

Return Points Won vs 1st Serve %

—

32.7%

Return Points Won vs 2nd Serve %

—

47.4%

Aces per Service Game

—

0.14

Double Faults per Service Game

—

0.14

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

1st Serve In %

56.9%

63.4%

1st Serve Points Won %

70.6%

69.1%

2nd Serve Points Won %

52.0%

54.1%

Return Points Won vs 1st Serve %

23.5%

31.1%

Return Points Won vs 2nd Serve %

44.9%

43.0%

Aces per Service Game

0.59

0.27

Double Faults per Service Game

0.37

0.17

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.

Jan Kumstat Filip Cristian Jianu

Break Points Saved %

—

70.3%

Break Points Converted %

—

58.3%

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

Break Points Saved %

61.5%

58.8%

Break Points Converted %

28.3%

41.9%

Based on each player's last 10 Challenger matches.

Head-to-Head

Jan Kumstat 0 – 0 Filip Cristian Jianu

Clay Prague 2 challenger · 2026-08-21

SF

Jan Kumstat #347

Filip Cristian Jianu #284

6-1 6-4

6 Aces 2

0 Double Faults 1

41 Service Points 46

25 First Serve In 30

24 First Serve Won 21

13 Second Serve Won 6

0 Break Points Saved 3

0 Break Points Faced 6

- Winners -

- Unforced Errors -

1.3 Average Odds 3.3

Jan Kumstat vs Filip Cristian Jianu — Prediction