| Shenzhen, China, Qualifying | 03/11 06:00 | 46 | Yunseong Chung v Quinzi, Gianluigi | 6-7,6-3,5-7 | |
| Shenzhen, China, Qualifying | 03/11 01:30 | 45 | Rigele Te v Quinzi, Gianluigi | 6-7,5-7 | |
| Bergamo, Italy | 02/22 17:00 | 26 | Quinzi, Gianluigi v Arnaboldi, Andrea | 6-7,6-3,3-6 | |
| Bergamo, Italy | 02/20 14:00 | 25 | Quinzi, Gianluigi v Basso, Andrea | 6-4,6-2 | |
| ITF Egypt F4 | 02/11 08:00 | 29 | Pospisil, Jaroslav v Quinzi, Gianluigi | 2-6,4-6 | |
| ITF Egypt F4 | 02/10 08:00 | 28 | David Poljak v Quinzi, Gianluigi | 3-6,1-6 | |
| ITF Egypt F4 | 02/09 11:30 | 27 | Slobodchikov, Ronald v Quinzi, Gianluigi | 3-6,4-6 | |
| ITF Egypt F4 | 02/08 08:00 | 26 | Marek Gengel v Quinzi, Gianluigi | 3-6,5-7 | |
| ITF Egypt F4 | 02/06 08:00 | 25 | Andrzejczuk, Adrian v Quinzi, Gianluigi | 0-6,6-4,5-7 | |
| ITF Egypt F3 | 02/01 16:20 | 26 | David Poljak v Quinzi, Gianluigi | Retired | |
| ITF Egypt F3 | 01/30 14:00 | 25 | Kirill Kivattsev v Quinzi, Gianluigi | 4-6,4-6 | |
| ITF Turkey F2 | 01/19 08:40 | 27 | Sieber, Marc v Quinzi, Gianluigi | 7-5,6-4 | |
| ITF Turkey F2 | 01/18 09:25 | 26 | Sude, Jakob v Quinzi, Gianluigi | 2-6,5-7 | |
| ITF Turkey F2 | 01/17 08:55 | 25 | Benjamin Lock v Quinzi, Gianluigi | 0-6,1-6 | |
| ITF Turkey F1 | 01/15 08:00 | 29 | Sieber, Marc v Quinzi, Gianluigi | 6-3,3-6,3-6 | |
| ITF Turkey F1 | 01/14 12:00 | 28 | Altug Celikbilek v Quinzi, Gianluigi | 3-6,2-6 | |
| ITF Turkey F1 | 01/13 12:00 | 27 | Frunza, Nicolae v Quinzi, Gianluigi | 3-6,3-6 | |
| ITF Turkey F1 | 01/12 11:30 | 26 | Matteo Martineau v Quinzi, Gianluigi | 4-6,5-7 | |
| ITF Turkey F1 | 01/10 08:00 | 25 | Milan Drinic v Quinzi, Gianluigi | 2-6,2-6 | |
| ATP Next Gen Finals | 11/09 13:00 | 1 | [54] Chung, Hyeon v Quinzi, Gianluigi [306] | 1-4,4-1,4-2,3-4,4-3 | |
| ATP Next Gen Finals | 11/08 18:30 | 29 | [51] Denis Shapovalov v Quinzi, Gianluigi [306] | 4-1,4-1,3-4,4-3 | |
| ATP Next Gen Finals | 11/07 20:50 | 28 | [37] Andrey Rublev v Quinzi, Gianluigi [306] | 1-4,4-0,4-3,0-4,4-3 | |
| ATP Next Gen Finals 8th spot | 11/05 16:52 | - | [459] Baldi, Filippo v Quinzi, Gianluigi [294] | 4-3,4-3,2-4,2-4,2-4 | |
| ATP Next Gen Finals 8th spot | 11/04 14:01 | - | [423] Caruana, Liam v Quinzi, Gianluigi [294] | 0-4,4-1,1-4,3-4 | |
| ATP Next Gen Finals 8th spot | 11/03 13:48 | - | Balzerani, Riccardo v Quinzi, Gianluigi | 2-4,2-4,2-3 | |
| Challenger Manerbio | 08/24 15:30 | 26 | Quinzi, Gianluigi v Roberto Carballes Baena | 5-7,3-6 | |
| Challenger Manerbio | 08/22 13:35 | 25 | [307] Quinzi, Gianluigi v Bernabe Zapata Miralles [278] | 4-6,6-4,6-1 | |
| Cordenons, Italy | 08/15 14:35 | 25 | [197] Lorenzo Giustino v Quinzi, Gianluigi [260] | 4-6,6-2,6-1 | |
| ATP Gstaad Qual | 07/22 11:25 | 45 | [137] Souza, Joao Olavo v Quinzi, Gianluigi [258] | 6-4,3-6,7-6 | |
| Wimbledon Qual | 06/26 10:00 | 44 | [218] Garin, Cristian v Quinzi, Gianluigi [242] | 6-4,6-3 |