ATP tennis predict — Quentin Halys vs Facundo Diaz Acosta

Grand Slam Hard US Open · 1. round 22:00

Predicted probability

Quentin Halys

France

72.77%

Facundo Diaz Acosta

Argentina

27.23%

Average Odds

1.29 / 3.69

Market probability

74.10% / 25.90%

Why This Prediction?

Quentin Halys is the favorite because he has a higher Elo rating on hard courts (1750 vs 1503), more wins on hard courts (91 vs 9) and a stronger serve (66.4% vs 63.6% of service points won).

Player Comparison

1764.3 Elo 1794.4

1749.5 Elo (surface) 1502.7

144 Wins 33

91 Wins (surface) 9

11 Last 15 form 4

0 Head-to-head wins 1

0.909 Dominance ratio 1.002

52 Rank 82

29.8 Age 25.7

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.

Quentin Halys

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

Favorite (odds 1.30-1.80) 7W–4L · 63.6%

Even match (odds 1.80-2.20) 0W–1L · 0.0%

Underdog (odds 2.20-4.00) 7W–2L · 77.8%

Heavy underdog (odds above 4.00) 0W–2L · 0.0%

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

Facundo Diaz Acosta

Heavy favorite (odds below 1.30) 11W–2L · 84.6%

Favorite (odds 1.30-1.80) 10W–2L · 83.3%

Even match (odds 1.80-2.20) 1W–0L · 100.0%

Underdog (odds 2.20-4.00) 0W–3L · 0.0%

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

30 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.

Quentin Halys Facundo Diaz Acosta

1st Serve In %

57.4%

65.8%

1st Serve Points Won %

77.5%

69.8%

2nd Serve Points Won %

48.8%

49.1%

Return Points Won vs 1st Serve %

22.2%

30.0%

Return Points Won vs 2nd Serve %

47.3%

49.7%

Aces per Service Game

0.74

0.39

Double Faults per Service Game

0.33

0.23

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

1st Serve In %

63.5%

69.2%

1st Serve Points Won %

77.4%

70.0%

2nd Serve Points Won %

51.0%

62.4%

Return Points Won vs 1st Serve %

25.3%

40.2%

Return Points Won vs 2nd Serve %

47.3%

53.6%

Aces per Service Game

0.66

0.25

Double Faults per Service Game

0.27

0.11

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.

Quentin Halys Facundo Diaz Acosta

Break Points Saved %

72.5%

57.1%

Break Points Converted %

36.8%

48.6%

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

Break Points Saved %

73.6%

76.6%

Break Points Converted %

33.3%

48.2%

Based on each player's last 10 Challenger matches.

Head-to-Head

Quentin Halys 0 – 1 Facundo Diaz Acosta

Hard US Open · 2026-09-01

1. round

Quentin Halys #52

Facundo Diaz Acosta #82

6-4 7-5 6-7 6-1

18 Aces 12

9 Double Faults 7

138 Service Points 126

82 First Serve In 93

67 First Serve Won 62

27 Second Serve Won 14

5 Break Points Saved 6

7 Break Points Faced 12

53 Winners 43

49 Unforced Errors 54

1.3 Average Odds 3.7

Hard Winston-Salem · 2023-08-21

R64

Facundo Diaz Acosta #93

Quentin Halys #69

4-6 6-2 6-4

2 Aces 13

4 Double Faults 10

85 Service Points 84

59 First Serve In 39

45 First Serve Won 31

13 Second Serve Won 21

4 Break Points Saved 6

5 Break Points Faced 9

- Winners -

- Unforced Errors -

- Average Odds -

Quentin Halys vs Facundo Diaz Acosta — Prediction