| Challenger Cleveland | 02/03 19:35 | 27 |
[106] Emilio Gomez
v
Gabriel Diallo [221] 
|
7-6,4-6,7-5 | |
| Challenger Cleveland | 02/01 17:50 | 26 |
[229] Mitchell Krueger
v
Gabriel Diallo [221]
|
7-6,1-6,1-6 | |
| Challenger Cleveland | 01/31 15:00 | 25 |
[404] Alafia Ayeni
v
Gabriel Diallo [221]
|
1-6,1-6 | |
| Australian Open | 01/09 07:50 | 14 |
[222] Gabriel Diallo v
Aleksandar Vukic
[129] 
|
3-6,4-6 | |
| Challenger Canberra | 01/01 23:00 | 168 |
[200] Francesco Maestrelli
v
Gabriel Diallo [227]
|
3-6,7-6,6-4 | |
| Challenger Canberra | 12/31 23:00 | 45 |
[227] Gabriel Diallo v
Juncheng Shang
[192] 
|
6-3,7-6 | |
| Challenger Drummondville | 11/17 20:30 | 26 |
[224] Gabriel Diallo v
Charles Broom
[383] 
|
4-6,2-6 | |
| Challenger Drummondville | 11/15 21:00 | 25 |
[224] Gabriel Diallo v
Kai Wehnelt
[222] |
6-4,7-6 | |
| Challenger Calgary | 11/12 20:50 | 28 |
[259] Dominik Koepfer
v
Gabriel Diallo [248]
|
7-6,6-1 | |
| Challenger Calgary | 11/11 22:35 | 27 |
[248] Gabriel Diallo v
Antoine Escoffier
[216] 
|
6-3,5-7,7-5 | |
| Challenger Calgary | 11/10 00:45 | 26 |
[140] Juan Pablo Ficovich
v
Gabriel Diallo [248]
|
3-6,2-6 | |
| Challenger Calgary | 11/08 01:00 | 25 |
Gabriel Diallo v
Julian Ocleppo
|
7-6,6-4 | |
| Challenger Las Vegas | 10/26 17:30 | 26 |
[148] Juan Pablo Ficovich
v
Gabriel Diallo [250]
|
3-6,7-6,6-4 | |
| Challenger Las Vegas | 10/24 19:20 | 25 |
[250] Gabriel Diallo v
Enzo Couacaud
[183] 
|
6-4,6-4 | |
| Challenger Fairfield | 10/16 19:00 | 29 |
[325] Gabriel Diallo v
Michael Mmoh
[133] |
3-6,2-6 | |
| Challenger Fairfield | 10/15 19:50 | 28 |
Alafia Ayeni
v
Gabriel Diallo
|
3-6,1-6 | |
| Challenger Fairfield | 10/14 23:00 | 27 |
[325] Gabriel Diallo v
Enzo Couacaud
[184]
|
7-6,7-5 | |
| Challenger Fairfield | 10/13 23:00 | 26 |
[160] Ben Shelton
v
Gabriel Diallo [325]
|
7-5,6-7,3-6 | |
| Challenger Fairfield | 10/11 22:20 | 25 |
[325] Gabriel Diallo v
Leandro Riedi
[252] |
2-6,6-4,6-2 | |
| Challenger Columbus | 09/23 16:15 | 27 |
[98] Jordan Thompson
v
Gabriel Diallo [335]
|
6-2,6-1 | |
| Challenger Columbus | 09/22 17:55 | 26 |
[335] Gabriel Diallo v
Aidan Mchugh
[359] |
7-5,6-7,7-5 | |
| Challenger Columbus | 09/20 16:00 | 25 |
[497] Strong Kirchheimer
v
Gabriel Diallo [335]
|
4-6,3-6 | |
| Challenger Columbus | 09/20 15:55 | 25 |
Yasutaka Uchiyama
v
Gabriel Diallo
|
Cancelled | |
| Davis Cup | 09/17 14:00 | - |
Laslo Djere
v
Gabriel Diallo
|
6-2,6-2 | |
| Challenger Granby | 08/28 17:00 | 29 |
Gabriel Diallo v
Juncheng Shang
|
7-5,7-6 | |
| Challenger Granby | 08/27 16:00 | 28 |
Gabriel Diallo v
Hiroki Moriya
|
6-3,6-4 | |
| Challenger Granby | 08/26 20:00 | 27 |
Aziz Dougaz
v
Gabriel Diallo
|
6-3,3-6,6-7 | |
| Challenger Granby | 08/25 14:00 | 26 |
Gabriel Diallo v
Cedrik-Marcel Stebe
|
6-4,4-6,7-6 | |
| Challenger Granby | 08/24 14:00 | 25 |
Dan Martin
v
Gabriel Diallo
|
5-7,1-6 | |
| Challenger Vancouver | 08/17 18:50 | 26 |
Ricardas Berankis
v
Gabriel Diallo
|
6-4,6-1 |