| Australian Open | 01/15 23:00 | 44 | [149] Lorenzo Giustino v Yan Bai [218] | 6-3,7-5 | |
| Challenger - Canberra | 01/06 06:35 | 24 | [162] Oscar Otte v Lorenzo Giustino [149] | 5-7,6-1,6-4 | |
| Challenger - Lima | 10/23 17:25 | 25 | [226] Rafael Matos v Lorenzo Giustino [147] | Retired | |
| Challenger - Barcelona | 10/02 15:00 | 25 | [227] Carlos Taberner v Lorenzo Giustino [142] | 6-4,6-0 | |
| Challenger - Florenz | 09/25 13:20 | 25 | [244] Mohamed Safwat v Lorenzo Giustino [144] | 6-3,2-6,6-3 | |
| Challenger - Biella | 09/17 14:30 | 25 | [219] Andrea Collarini v Lorenzo Giustino [141] | 7-6,5-7,6-3 | |
| Challenger - Stettin | 09/11 08:00 | 25 | [138] Lorenzo Giustino v Jozef Kovalik [346] | 7-6,6-7,1-6 | |
| Challenger - Genova | 09/03 10:00 | 25 | [128] Lorenzo Giustino v Giulio Zeppieri [470] | 3-6,2-6 | |
| Challenger - Como | 08/27 12:00 | 25 | [128] Lorenzo Giustino v Facundo Mena [266] | 3-6,2-6 | |
| US Open | 08/20 15:00 | 44 | [166] Guillermo Garcia-Lopez v Lorenzo Giustino [128] | 3-6,7-5,6-2 | |
| Challenger - Manerbio | 08/09 13:00 | 27 | [177] Federico Gaio v Lorenzo Giustino [130] | Retired | |
| Challenger - Manerbio | 08/09 08:00 | 26 | [267] Pavel Kotov v Lorenzo Giustino [130] | 6-1,4-6,5-7 | |
| Challenger - Manerbio | 08/07 10:50 | 25 | [400] Martin Cuevas v Lorenzo Giustino [130] | 6-7,6-3,3-6 | |
| Challenger - Sopot | 07/30 11:00 | 25 | [131] Lorenzo Giustino v Aslan Karatsev [321] | 6-7,3-6 | |
| Challenger - Prag | 07/26 13:30 | 27 | [266] Mario Vilella Martinez v Lorenzo Giustino [137] | 6-0,7-6 | |
| Challenger - Prag | 07/25 08:00 | 26 | [364] Vaclav Safranek v Lorenzo Giustino [137] | 3-6,2-6 | |
| Challenger - Prag | 07/23 09:35 | 25 | [308] Tak Khunn Wang v Lorenzo Giustino [137] | 3-6,2-6 | |
| Challenger - Nur-Sultan | 07/16 12:00 | 25 | [382] Sebastian Korda v Lorenzo Giustino [130] | 7-5,6-3 | |
| Challenger - Recanati | 07/03 17:30 | 25 | [132] Lorenzo Giustino v Alessandro Bega [361] | 6-7,2-6 | |
| Wimbledon | 06/24 14:40 | 44 | [198] Daniel Elahi Galan v Lorenzo Giustino [134] | 7-6,6-3 | |
| Challenger - Blois | 06/22 12:00 | 28 | [122] Pedro Sousa v Lorenzo Giustino [141] | 6-4,6-2 | |
| Challenger - Blois | 06/21 14:30 | 27 | [141] Lorenzo Giustino v Daniel Elahi Galan [197] | 6-3,6-1 | |
| Challenger - Blois | 06/20 17:30 | 26 | [141] Lorenzo Giustino v Steven Diez [239] | 7-6,3-6,7-6 | |
| Challenger - Blois | 06/19 11:05 | 25 | [141] Lorenzo Giustino v Alexandre Muller [297] | 3-6,6-4,6-4 | |
| Challenger - Shymkent 2 | 06/14 06:30 | 27 | [201] Federico Coria v Lorenzo Giustino [144] | 6-7,6-3,6-1 | |
| Challenger - Shymkent 2 | 06/13 08:40 | 26 | [245] Kaichi Uchida v Lorenzo Giustino [144] | 3-6,2-6 | |
| Challenger - Shymkent 2 | 06/12 06:00 | 25 | [340] Baptiste Crepatte v Lorenzo Giustino [144] | 2-6,2-6 | |
| Challenger - Almaty | 06/09 05:00 | 29 | [159] Lorenzo Giustino v Federico Coria [234] | 6-4,6-4 | |
| Challenger - Almaty | 06/08 06:20 | 28 | [159] Lorenzo Giustino v Mario Vilella Martinez [292] | 7-5,4-6,6-2 | |
| Challenger - Almaty | 06/07 06:55 | 27 | [353] Alejandro Tabilo v Lorenzo Giustino [159] | 3-6,6-1,3-6 |
Lorenzo Giustino (* 10. September 1991 in Neapel) ist ein italienischer Tennisspieler.