| Challenger Cagliari | 05/01 09:50 | 25 |
[154] Gabriel Diallo v
Juan Manuel Cerundolo
[179] 
|
0-6,6-7 | |
| Challenger Cagliari | 04/30 08:00 | 19 |
[154] Gabriel Diallo v
Hugo Dellien
[173] 
|
7-5,6-2 | |
| Challenger Cagliari | 04/29 10:25 | 14 |
[154] Gabriel Diallo v
Orlando Luz
[333] |
7-6,7-6 | |
| Challenger Ostrava | 04/22 15:00 | 25 |
[235] Henri Squire
v
Gabriel Diallo [154]
|
6-2,5-7,6-4 | |
| Challenger Sarasota | 04/12 17:30 | 27 |
[150] Gabriel Diallo v
Thanasi Kokkinakis
[106] 
|
6-7,6-4,6-7 | |
| Challenger Sarasota | 04/11 16:45 | 26 |
[150] Gabriel Diallo v
Tristan Boyer
[196] 
|
6-7,6-3,6-4 | |
| Challenger Sarasota | 04/09 19:55 | 25 |
[150] Gabriel Diallo v
Federico Agustin Gomez
[332] 
|
7-6,7-6 | |
| ATP Houston | 03/30 16:00 | 14 |
[133] Gabriel Diallo v
Mitchell Krueger
[282] 
|
6-7,6-7 | |
| ATP Miami | 03/18 15:00 | 14 |
[133] Gabriel Diallo v
Sumit Nagal
[97] 
|
6-7,2-6 | |
| ATP Delray Beach | 02/12 23:00 | 25 |
[136] Gabriel Diallo v
Nuno Borges
[46] 
|
4-6,6-7 | |
| ATP Delray Beach | 02/11 19:35 | 19 |
[138] Gabriel Diallo v
Zachary Svajda
[145] 
|
4-6,6-4,3-6 | |
| ATP Delray Beach | 02/10 20:05 | 14 |
[138] Gabriel Diallo v
Valentin Vacherot
[173] 
|
6-4,6-4 | |
| Davis Cup | 02/03 21:40 | 168 |
[132] Gabriel Diallo v
Seongchan Hong
[224] 
|
7-5,4-6,6-1 | |
| Davis Cup | 02/02 21:00 | 168 |
Gabriel Diallo v
Soonwoo Kwon
|
6-4,6-4 | |
| Challenger Quimper | 01/25 18:25 | 26 |
[157] Harold Mayot
v
Gabriel Diallo [135]
|
7-6,7-6 | |
| Challenger Quimper | 01/23 19:30 | 25 |
[156] Elias Ymer
v
Gabriel Diallo [135]
|
5-7,2-6 | |
| Australian Open | 01/12 00:35 | 19 |
[107] David Goffin
v
Gabriel Diallo [136]
|
3-6,6-3,6-2 | |
| Australian Open | 01/10 23:00 | 15 |
[234] Pierre-Hugues Herbert
v
Gabriel Diallo [136]
|
6-4,4-6,6-7 | |
| Australian Open | 01/09 00:45 | 14 |
[162] Pablo Llamas Ruiz
v
Gabriel Diallo [136]
|
6-7,1-6 | |
| Challenger Canberra | 01/05 04:40 | 28 |
[77] Dominik Koepfer
v
Gabriel Diallo [139]
|
6-7,7-5,6-3 | |
| Challenger Canberra | 01/04 00:40 | 27 |
[139] Gabriel Diallo v
Matteo Gigante
[181] 
|
7-6,6-2 | |
| Challenger Canberra | 01/03 00:30 | 26 |
[201] Rudolf Molleker
v
Gabriel Diallo [139]
|
6-7,3-6 | |
| Challenger Canberra | 01/01 00:25 | 25 |
[139] Gabriel Diallo v
Juan Manuel Cerundolo
[120]
|
4-6,6-3,6-0 | |
| Davis Cup | 11/21 16:40 | 27 |
[139] Gabriel Diallo v
Otto Virtanen
[171] 
|
4-6,5-7 | |
| Challenger Drummondville | 11/14 15:00 | 25 |
Gabriel Diallo v
Michael Vrbensky
|
Cancelled | |
| Challenger Calgary | 11/11 22:30 | 28 |
Dominik Koepfer
v
Gabriel Diallo
|
Walkover | |
| Challenger Calgary | 11/10 23:00 | 27 |
[133] Gabriel Diallo v
Aziz Dougaz
[242] 
|
6-3,6-2 | |
| Challenger Calgary | 11/09 22:45 | 26 |
[133] Gabriel Diallo v
Joao Sousa
[276] |
5-7,7-5,6-3 | |
| Challenger Calgary | 11/08 04:30 | 25 |
[133] Gabriel Diallo v
Andrew Paulson
[302] |
4-6,7-6,6-4 | |
| Challenger Brest | 10/24 11:15 | 25 |
[132] Radu Albot
v
Gabriel Diallo [133]
|
6-7,6-2,6-3 |