ATP tennis predict — Stefan Kozlov vs Leo Vithoontien

Challenger Hard Bloomfield Hills challenger · qualification - 1. round

Predicted probability

Stefan Kozlov

USA

84.49%

Leo Vithoontien

Japan

15.51%

Average Odds

1.09 / 6.58

Market probability

85.79% / 14.21%

Why This Prediction?

Stefan Kozlov is the favorite because he has a higher Elo rating (1697 vs 1389), a higher Elo rating on hard courts (1673 vs 1415) and more wins on hard courts (25 vs 0).

Player Comparison

1697.0 Elo 1388.8

1672.5 Elo (surface) 1414.8

217 Wins (Challenger) 13

163 Wins (surface) 13

8 Last 15 form 6

0 Head-to-head wins 0

1.152 Dominance ratio 0.910

296 Rank 676

28.5 Age 26.9

right Hand left

Performance vs. the Odds

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

Stefan Kozlov

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

Favorite (odds 1.30-1.80) 1W–2L · 33.3%

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

Underdog (odds 2.20-4.00) 1W–3L · 25.0%

Heavy underdog (odds above 4.00) 1W–2L · 33.3%

13 matches with market odds since 2026-07-05.

Leo Vithoontien

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

Favorite (odds 1.30-1.80) 0W–0L · 0.0%

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

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

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

2 matches with market odds since 2026-07-12.

Serve & Return

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

Stefan Kozlov Leo Vithoontien

1st Serve In %

64.3%

—

1st Serve Points Won %

53.1%

—

2nd Serve Points Won %

38.9%

—

Return Points Won vs 1st Serve %

35.1%

—

Return Points Won vs 2nd Serve %

50.8%

—

Aces per Service Game

0.12

—

Double Faults per Service Game

0.35

—

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

1st Serve In %

65.7%

64.8%

1st Serve Points Won %

66.2%

68.9%

2nd Serve Points Won %

51.6%

49.4%

Return Points Won vs 1st Serve %

37.6%

29.6%

Return Points Won vs 2nd Serve %

55.7%

47.4%

Aces per Service Game

0.19

0.37

Double Faults per Service Game

0.25

0.32

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.

Stefan Kozlov Leo Vithoontien

Break Points Saved %

49.5%

—

Break Points Converted %

40.0%

—

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

Break Points Saved %

57.1%

45.6%

Break Points Converted %

42.9%

38.3%

Based on each player's last 10 Challenger matches.

Head-to-Head

Stefan Kozlov 0 – 0 Leo Vithoontien

Hard Bloomfield Hills challenger · 2026-07-19

qualification - 1. round

Stefan Kozlov #296

Leo Vithoontien #690

4-6 6-1 6-2

1 Aces 2

1 Double Faults 1

79 Service Points 88

68 First Serve In 73

49 First Serve Won 42

5 Second Serve Won 6

3 Break Points Saved 7

4 Break Points Faced 11

- Winners -

- Unforced Errors -

1.1 Average Odds 6.6

Stefan Kozlov vs Leo Vithoontien — Prediction