| US Open | 08/22 16:30 | 19 |
[198] Valentin Royer
v
Gabriel Diallo [144] 
|
6-7,4-6 | |
| US Open | 08/21 19:00 | 15 |
[144] Gabriel Diallo v
Titouan Droguet
[148] 
|
3-6,7-5,6-3 | |
| US Open | 08/20 00:20 | 14 |
[231] Sho Shimabukuro
v
Gabriel Diallo [155]
|
6-4,5-7,3-6 | |
| Challenger Cary | 08/16 17:00 | 28 |
[113] Mattia Bellucci
v
Gabriel Diallo [155]
|
6-3,6-3 | |
| Challenger Cary | 08/15 16:25 | 27 |
[155] Gabriel Diallo v
Tristan Boyer
[210] 
|
7-6,6-7,6-4 | |
| Challenger Cary | 08/14 16:20 | 26 |
[111] Luca Van Assche
v
Gabriel Diallo [155]
|
4-6,3-6 | |
| Challenger Cary | 08/13 15:55 | 25 |
[154] Coleman Wong
v
Gabriel Diallo [155]
|
2-6,6-1,2-6 | |
| Challenger Cary | 08/11 16:35 | 19 |
[141] Gabriel Diallo v
Shintaro Mochizuki
[158] 
|
7-6,6-2 | |
| Challenger Cary | 08/10 18:15 | 14 |
[141] Gabriel Diallo v
Eliot Spizzirri
[353] 
|
7-6,7-6 | |
| ATP Montreal | 08/06 20:30 | 24 |
[141] Gabriel Diallo v
Karen Khachanov
[22] 
|
4-6,4-6 | |
| Challenger Lexington | 08/03 14:00 | 27 |
[148] Gabriel Diallo v
Joao Fonseca
[214] 
|
2-6,2-6 | |
| Challenger Lexington | 08/02 16:00 | 26 |
[148] Gabriel Diallo v
Ethan Quinn
[254] 
|
6-3,7-6 | |
| Challenger Lexington | 07/30 22:30 | 25 |
[148] Gabriel Diallo v
Ryan Seggerman
[411] |
7-6,3-6,6-1 | |
| Challenger Chicago | 07/28 17:00 | 29 |
[169] Gabriel Diallo v
Yunchaokete Bu
[147] 
|
6-3,7-6 | |
| Challenger Chicago | 07/27 18:30 | 28 |
[225] Jacob Fearnley
v
Gabriel Diallo [169]
|
2-6,3-6 | |
| Challenger Chicago | 07/26 16:00 | 27 |
[169] Gabriel Diallo v
Mitchell Krueger
[202] 
|
6-3,6-2 | |
| Challenger Chicago | 07/24 18:00 | 26 |
[169] Gabriel Diallo v
Joao Fonseca
[217]
|
7-6,6-1 | |
| Challenger Chicago | 07/23 16:00 | 25 |
[169] Gabriel Diallo v
James Trotter
[323] 
|
6-4,6-2 | |
| ATP Newport | 07/16 17:10 | 25 |
[116] Billy Harris
v
Gabriel Diallo [165]
|
7-6,7-5 | |
| Wimbledon | 06/26 10:00 | 15 |
[106] Daniel Elahi Galan
v
Gabriel Diallo [166]
|
6-4,7-6 | |
| Wimbledon | 06/24 10:00 | 14 |
[231] Aziz Dougaz
v
Gabriel Diallo [166]
|
7-6,1-6,6-7 | |
| Challenger Ilkley | 06/19 12:40 | 25 |
[176] Gabriel Diallo v
Titouan Droguet
[132]
|
5-7,7-5,3-6 | |
| Challenger Ilkley | 06/16 15:05 | 19 |
[165] Gabriel Diallo v
Matteo Martineau
[179] 
|
6-3,5-7,6-3 | |
| Challenger Ilkley | 06/15 17:50 | 14 |
[165] Gabriel Diallo v
Li Tu
[205] 
|
6-3,6-7,6-3 | |
| Challenger Nottingham | 06/11 16:20 | 25 |
[165] Gabriel Diallo v
Mattia Bellucci
[160]
|
4-6,6-4,5-7 | |
| French Open | 05/26 16:05 | 23 |
[350] Kei Nishikori
v
Gabriel Diallo [166]
|
7-5,7-6,3-6,1-6,7-5 | |
| French Open | 05/23 13:10 | 19 |
[166] Gabriel Diallo v
Alexander Ritschard
[184] 
|
2-6,6-2,6-3 | |
| French Open | 05/22 10:40 | 15 |
[169] Marco Trungelliti
v
Gabriel Diallo [166]
|
6-7,6-3,4-6 | |
| French Open | 05/20 09:30 | 14 |
[188] Genaro Alberto Olivieri
v
Gabriel Diallo [166]
|
5-7,7-6,1-6 | |
| Challenger Mauthausen | 05/07 10:55 | 25 |
[211] Lukas Neumayer
v
Gabriel Diallo [152]
|
Retired |