ATP tennis predict — Niels Visker vs Szymon Kielan

Challenger Clay Porto 2 challenger · qualification - round of 16 11:00

Predicted probability

Niels Visker

Netherlands

68.84%

Szymon Kielan

Poland

31.16%

Average Odds

1.12 / 5.39

Market probability

82.80% / 17.20%

Why This Prediction?

Niels Visker is the favorite because he has a higher Elo rating (1522 vs 1424), a stronger serve (66.3% vs 53.6% of service points won) and a higher Elo rating on clay courts (1535 vs 1439).

Player Comparison

1521.8 Elo 1423.9

1535.2 Elo (surface) 1439.3

31 Wins (Challenger) 5

10 Wins (surface) 4

9 Last 15 form 4

0 Head-to-head wins 0

1.015 Dominance ratio 0.820

430 Rank 1348

24.9 Age 23.8

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.

Niels Visker

Heavy favorite (odds below 1.30) 4W–0L · 100.0%

Favorite (odds 1.30-1.80) 0W–1L · 0.0%

Even match (odds 1.80-2.20) 0W–2L · 0.0%

Underdog (odds 2.20-4.00) 2W–6L · 25.0%

Heavy underdog (odds above 4.00) 2W–0L · 100.0%

17 matches with market odds since 2026-06-06.

Szymon Kielan

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) 1W–0L · 100.0%

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

4 matches with market odds since 2026-05-24.

Serve & Return

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

Niels Visker Szymon Kielan

1st Serve In %

62.9%

—

1st Serve Points Won %

74.5%

—

2nd Serve Points Won %

50.6%

—

Return Points Won vs 1st Serve %

18.5%

—

Return Points Won vs 2nd Serve %

47.7%

—

Aces per Service Game

0.52

—

Double Faults per Service Game

0.18

—

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

1st Serve In %

57.5%

59.1%

1st Serve Points Won %

77.8%

66.2%

2nd Serve Points Won %

54.3%

36.4%

Return Points Won vs 1st Serve %

27.6%

30.6%

Return Points Won vs 2nd Serve %

46.5%

50.0%

Aces per Service Game

0.43

0.38

Double Faults per Service Game

0.32

0.59

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.

Niels Visker Szymon Kielan

Break Points Saved %

61.5%

—

Break Points Converted %

21.4%

—

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

Break Points Saved %

60.0%

61.4%

Break Points Converted %

27.3%

43.8%

Based on each player's last 10 Challenger matches.

Head-to-Head

Niels Visker 0 – 0 Szymon Kielan

Clay Porto 2 challenger · 2026-08-31

qualification - round of 16

Niels Visker #430

Szymon Kielan #1348

6-3 7-5

2 Aces 4

4 Double Faults 4

63 Service Points 74

37 First Serve In 42

29 First Serve Won 26

13 Second Serve Won 14

3 Break Points Saved 10

4 Break Points Faced 14

- Winners -

- Unforced Errors -

1.1 Average Odds 5.4

Niels Visker vs Szymon Kielan — Prediction