| Challenger - Launceston | 02/02 02:00 | 28 | [360] Luke Saville v Lorenzo Giustino [227] | 6-7,6-2,5-7 | |
| Challenger - Launceston | 02/01 03:35 | 27 | [227] Lorenzo Giustino v Jay Clarke [212] | Retired | |
| Challenger - Launceston | 01/30 23:00 | 26 | [265] Maverick Banes v Lorenzo Giustino [227] | 6-7,3-6 | |
| Challenger - Launceston | 01/30 02:40 | 25 | [278] Yunseong Chung v Lorenzo Giustino [227] | 3-6,7-6,3-6 | |
| Challenger - Burnie | 01/24 03:30 | 26 | [435] Harry Bourchier v Lorenzo Giustino [222] | 7-6,7-6 | |
| Challenger - Burnie | 01/21 23:00 | 25 | [277] Yunseong Chung v Lorenzo Giustino [222] | 2-6,3-6 | |
| Australian Open | 01/09 00:35 | 44 | [223] Lorenzo Giustino v Yuichi Sugita [146] | 6-7,6-2,4-6 | |
| Challenger - Noumea | 12/31 02:25 | 24 | [259] Lorenzo Giustino v Thai-Son Kwiatkowski [417] | 2-6,3-6 | |
| Challenger - Montevideo | 11/09 18:00 | 27 | [205] Lorenzo Giustino v Guido Pella [65] | Retired | |
| Challenger - Montevideo | 11/07 18:40 | 26 | [260] Pedro Cachin v Lorenzo Giustino [205] | 1-6,3-6 | |
| Challenger - Montevideo | 11/05 17:00 | 25 | [205] Lorenzo Giustino v Thomaz Bellucci [247] | 6-3,6-3 | |
| Challenger - Guayaquil | 10/29 18:00 | 25 | [119] Juan Ignacio Londero v Lorenzo Giustino [206] | 6-2,6-4 | |
| Challenger - Barcelona | 10/12 09:30 | 27 | [174] Pedro Martinez v Lorenzo Giustino [218] | 6-2,7-5 | |
| Challenger - Barcelona | 10/11 09:30 | 26 | [218] Lorenzo Giustino v Nicola Kuhn [342] | 6-4,4-6,6-1 | |
| Challenger - Barcelona | 10/10 10:00 | 25 | [341] Jordi Samper-Montana v Lorenzo Giustino [218] | 4-6,4-6 | |
| Challenger - Florenz | 10/05 13:45 | 27 | [117] Pablo Andujar v Lorenzo Giustino [230] | 6-4,6-7,6-3 | |
| Challenger - Florenz | 10/04 08:30 | 26 | [276] Kevin Krawietz v Lorenzo Giustino [230] | 2-6,4-6 | |
| Challenger - Florenz | 10/02 13:55 | 25 | Lorenzo Giustino v Francesco Forti | 6-2,7-6 | |
| Challenger - Florenz | 10/02 08:00 | 25 | Lorenzo Giustino v Simone Bolelli | Cancelled | |
| Challenger - Biella | 09/18 11:45 | 25 | Roberto Carballes Baena v Lorenzo Giustino | 6-3,6-4 | |
| Challenger - Stettin | 09/13 12:45 | 26 | [189] Alexey Vatutin v Lorenzo Giustino [237] | 6-7,6-1,6-0 | |
| Challenger - Stettin | 09/11 16:00 | 25 | [237] Lorenzo Giustino v Dustin Brown [204] | 6-7,6-1,7-6 | |
| Challenger - Sevilla | 09/05 09:00 | 26 | [255] Lorenzo Giustino v Sergio Gutierrez-Ferrol [162] | 7-5,3-6,3-6 | |
| Challenger - Sevilla | 09/04 08:30 | 25 | [255] Lorenzo Giustino v Federico Gaio [242] | 6-4,6-2 | |
| Challenger - Como | 08/29 11:45 | 26 | [223] Viktor Galovic v Lorenzo Giustino [255] | 4-6,7-5,7-5 | |
| Challenger - Como | 08/28 08:00 | 25 | [255] Lorenzo Giustino v Stephane Robert [136] | 6-2,6-1 | |
| US Open | 08/24 15:00 | 46 | [255] Lorenzo Giustino v Dennis Novak [140] | 5-7,4-6 | |
| US Open | 08/23 15:00 | 45 | [232] Danilo Petrovic v Lorenzo Giustino [255] | 2-6,6-4,3-6 | |
| US Open | 08/21 17:05 | 44 | [219] Salvatore Caruso v Lorenzo Giustino [255] | 3-6,5-7 | |
| Challenger - Cordenons | 08/15 14:00 | 25 | [233] Lorenzo Giustino v Tommy Robredo [207] | 6-7,1-6 |
Lorenzo Giustino (* 10. September 1991 in Neapel) ist ein italienischer Tennisspieler.