ATP · Rank #607

Guillaume Dalmasso

23yrs 1.93 m 86 kg Right

59.5%Accuracy

Matches Analyzed

Recent Form

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Recent & Upcoming Tap a match for full analysis

ITF Men M25 Nevers Hard ITF Men M25 Nevers (Hard) 1

1 ▴1.35

1 ▴1.35

Challenger Cassis France Qualifying Hard Challenger Cassis France Qualifying (Hard) 1

2 ▴2.55

O21.5 ▾1.72

ITF Men M25+H Bagnères - de - Bigorre Hard ITF Men M25+H Bagnères - de - Bigorre (Hard) 2

1 ▾1.76

U22.5 ▴1.73

1 ▴1.38

1 ▴1.38

Challenger Kingston Jamaica Qualifying Hard Challenger Kingston Jamaica Qualifying (Hard) 1

2 ▾3.35

O20.5 ▴1.7

Challenger Vancouver Canada Qualifying Hard Challenger Vancouver Canada Qualifying (Hard) 1

2 ▴3.8

2 ▴3.8

Challenger Winnipeg Canada Qualifying Hard Challenger Winnipeg Canada Qualifying (Hard) 1

2 ▾3.2

2 ▾3.2

Challenger Granby Canada Hard Challenger Granby Canada (Hard) 3

2 ▾1.2

2 ▾1.2

2 ▴1.8

O20.5 ▾1.63

2 1.04

2 1.04

Challenger Nottingham 3 Great Britain Grass Challenger Nottingham 3 Great Britain (Grass) 1

1 ▾1.7

U25.5 ▴1.62

ITF Men M25+H Ajaccio Hard ITF Men M25+H Ajaccio (Hard) 1

1 ▾1.55

O22.5 ▾1.95

ITF Men M15 Vaasa Hard ITF Men M15 Vaasa (Hard) 2

2 ▴2.1

2 ▴2.1

1 ▾1.87

O21.5 1.8

Challenger Centurion 2 South Africa Hard Challenger Centurion 2 South Africa (Hard) 3

1 ▾1.47

O19.5 ▾1.41

1 ▾2.2

O19.5 ▴1.5

1 ▾1.68

1 ▾1.68

Challenger Centurion South Africa Hard Challenger Centurion South Africa (Hard) 2

2 ▾1.22

U23.5 ▾1.46

2 ▴1.3

2 ▴1.3

ITF Men M25 Nottingham Hard ITF Men M25 Nottingham (Hard) 1

2 1.16

U24.5 1.33

Record by surface

Hard

15-21

Clay

1-2

Grass

0-1

Overall 16-24

Our AI on this player 22 correct of 37

From the matches in our database

Most-played opponents

Benjamin Thomas George 2 meetings 1-1 Mikael Arseneault 2 meetings 1-1

About Guillaume Dalmasso

Guillaume Dalmasso is a 23-year-old right-handed professional tennis player, currently ranked world No. 607. The serve is the vulnerable side, at 7.1 double faults per match and 71.8% of first-serve points won. Breaking is the real weapon here: 37.3% of break chances get taken. Across everything played, 58.9% of all points end up on this side of the net. No surface has produced a winning record so far — Hard 15-21, Clay 1-2, Grass 0-1.

Lately it has not been coming together — 4 defeats in the last 5 outings. The longest match we have on record ran to 32 games, against T. Zeuch. Predictions cover match winner and score, alongside serve, return and break-point statistics. Most recently seen in our data at ITF Men M25 Nevers.

Serve & Return

First Serve %

61%

1st Serve Won

72.7%

2nd Serve Won

36.7%

Aces / Match

4.1

Double Faults / Match

9.2

Break Pts Saved

62.7%

Break Pts Converted

31.4%

Return Pts Won

36.3%

Service Hold %

77.6%

Total Pts Won

55.3%

Records Last 12 months

Titles

Finals

Semis or better

Events played

Tournament Results 1 title

ITF M15 Vaasa Men ITF Winner

UTR PTT Honolulu Men +H 01 UTR Final

ITF M15 San Jose Men ITF Semi-Finals

ITF M15 Budapest 2 Men ITF Quarter-Finals

Deepest runs first, not by date

Season by season

2026

2026so far

10–10

Won-lost

Matches

2–3

Tiebreaks

5.4

Aces / Match

9.6

Double Faults / Match

First Serve % 61.7%

1st Serve Won 72.9%

2nd Serve Won 41.3%

Break points won 35.1%

Break Pts Saved 62.6%

2025

1–2

Won-lost

Matches

1–0

Tiebreaks

5.3

Aces / Match

Double Faults / Match

First Serve % 63.8%

1st Serve Won 68.8%

2nd Serve Won 53.8%

Break points won 33.3%

Break Pts Saved 73.9%

Season totals from the tour feed, singles only. The won-lost line is the tour's own count and can differ from the record under Predictions, which counts the matches we cover. A dash means the season holds nothing to measure that figure from.

Frequently Asked Questions

How accurate are the AI predictions for Guillaume Dalmasso?

Our model has graded 37 matches involving Guillaume Dalmasso and got 22 right — a hit rate of 59.5%. The 20 most recent are listed below, each with the pick we made and how it finished.

Who has Guillaume Dalmasso played most often?

Of the matches we cover, Guillaume Dalmasso has met Benjamin Thomas George most often — 2 times, with a 1-1 record.