ATP · Rank #628

Guillaume Dalmasso

24yrs 1.93 m 86 kg Right

55.6%Accuracy

Matches Analyzed

Recent Form

LWLLW

Recent & Upcoming Tap a match for full analysis

Challenger Monastir Tunisia Qualifying Hard Challenger Monastir Tunisia Qualifying (Hard) 2

1 ▴1.28

1 ▴1.28

2 ▾1.56

O20.5 ▴1.66

ITF Men M25 Sarreguemines Hard ITF Men M25 Sarreguemines (Hard) 1

1 ▾2.26

1 ▾2.26

ITF Men M15 Offenbach Hard ITF Men M15 Offenbach (Hard) 3

1 ▴2.88

O19.5 ▴1.56

1 ▴1.8

O22.5 ▾2.1

1 ▴1.98

1 ▴1.98

ITF Men M15+H Rodez Hard ITF Men M15+H Rodez (Hard) 2

1 ▾2.55

O19.5 ▾1.55

2 ▾2.42

U22.5 ▴1.61

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

Record by surface

Hard

20-23

Clay

1-2

Grass

0-1

Overall 21-27

Our AI on this player 25 correct of 45

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 24-year-old right-handed professional tennis player, currently ranked world No. 628. The serve is the vulnerable side, at 6.9 double faults per match and 71.7% of first-serve points won. Breaking is the real weapon here: 43% of break chances get taken. Across everything played, 62% of all points end up on this side of the net. No surface has produced a winning record so far — Hard 20-23, Clay 1-2, Grass 0-1.

Results keep swinging: 2 up and 3 down across the last 5. The longest match we have on record ran to 35 games, against A. Braynin. More of the matches we cover came at ITF Men M15 Offenbach than anywhere else — 3 of them. Predictions cover match winner and score, alongside serve, return and break-point statistics. Most recently seen in our data at Challenger Monastir Tunisia Qualifying.

Serve & Return

First Serve %

68.6%

1st Serve Won

75%

2nd Serve Won

36.4%

Aces / Match

5.1

Double Faults / Match

4.9

Break Pts Saved

53.8%

Break Pts Converted

96.2%

Return Pts Won

38.3%

Service Hold %

246.9%

Total Pts Won

78.4%

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 Huamantla Men ITF Quarter-Finals ITF M15 Offenbach Men ITF Quarter-Finals ITF M15+H Rodez Men ITF Quarter-Finals Centurion 2, South Africa Challenger Round of 16 Centurion, South Africa Challenger Round of 16 ITF M25 Las Vegas, NV Men ITF Round of 16 ITF M25+H Ajaccio Men ITF Round of 16 ITF M25+H Bagnères-de-Bigorre Men ITF Round of 16 Granby, Canada Challenger Round of 32 ITF M15 Huamantla 2 Men ITF Round of 32 ITF M15 Sanxenxo Men ITF Round of 32 ITF M25 Nevers Men ITF Round of 32 ITF M25 Nottingham 2 Men ITF Round of 32 ITF M25 Nottingham Men ITF Round of 32 ITF M25 Sarreguemines Men ITF Round of 32 ITF M25 Winston-Salem, NC 2 Men ITF Round of 32 Metepec, Mexico Challenger Round of 32 Nottingham 3, Great Britain Challenger Round of 32 Morelos, Mexico Challenger Qualifying San Luis, Mexico Challenger Qualifying Cassis, France Challenger Qualifying Winnipeg, Canada Challenger Qualifying Kingston, Jamaica Challenger Qualifying Mexico City, Mexico Challenger Qualifying Vancouver, Canada Men Singles Challenger Qualifying

Deepest runs first, not by date

Season by season

2026

2026so far

12–11

Won-lost

Matches

2–3

Tiebreaks

4.9

Aces / Match

10.1

Double Faults / Match

First Serve % 62.5%

1st Serve Won 72.6%

2nd Serve Won 39.8%

Break points won 35.9%

Break Pts Saved 64.4%

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 45 matches involving Guillaume Dalmasso and got 25 right — a hit rate of 55.6%. 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.