ATP tennis predict — Niels Visker vs Guilherme Valdoleiros

Challenger Clay Porto 2 challenger · qualification - 1. round 11:00

Predicted probability

Niels Visker

Netherlands

83.15%

Guilherme Valdoleiros

Portugal

16.85%

Average Odds

1.06 / 6.56

Market probability

86.09% / 13.91%

Why This Prediction?

Niels Visker is the favorite because he has a higher Elo rating on clay courts (1511 vs 1406), more career match wins (30 vs 0) and a higher Elo rating (1505 vs 1401).

Player Comparison

1504.9 Elo 1400.8

1510.8 Elo (surface) 1406.4

30 Wins (Challenger) 0

9 Wins (surface) 0

8 Last 15 form 0

0 Head-to-head wins 0

0.895 Dominance ratio 0.519

426 Rank -

24.9 Age 27.1

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.

Guilherme Valdoleiros

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–0L · 0.0%

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

1 matches with market odds since 2026-08-30.

Serve & Return

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

Niels Visker Guilherme Valdoleiros

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%

68.0%

1st Serve Points Won %

77.8%

46.6%

2nd Serve Points Won %

54.3%

35.6%

Return Points Won vs 1st Serve %

27.6%

20.9%

Return Points Won vs 2nd Serve %

46.5%

46.3%

Aces per Service Game

0.43

0.15

Double Faults per Service Game

0.32

0.25

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 Guilherme Valdoleiros

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%

41.7%

Break Points Converted %

27.3%

16.0%

Based on each player's last 10 Challenger matches.

Head-to-Head

Niels Visker 0 – 0 Guilherme Valdoleiros

Clay Porto 2 challenger · 2026-08-30

qualification - 1. round

Niels Visker #430

Guilherme Valdoleiros #-

6-2 6-0

3 Aces 0

2 Double Faults 6

37 Service Points 53

22 First Serve In 31

19 First Serve Won 13

10 Second Serve Won 10

0 Break Points Saved 6

0 Break Points Faced 11

- Winners -

- Unforced Errors -

1.1 Average Odds 6.6

Niels Visker vs Guilherme Valdoleiros — Prediction