| Challenger - Marbella | 03/30 09:00 | 25 | [196] Mario Vilella Martinez v Lorenzo Giustino [164] | 7-6,6-0 | |
| ATP - Miami | 03/22 16:00 | 14 | [204] Mitchell Krueger v Lorenzo Giustino [164] | 6-4,6-3 | |
| ATP - Dubai | 03/16 12:50 | 25 | [163] Lorenzo Giustino v Aljaz Bedene [59] | 4-6,3-6 | |
| ATP - Dubai | 03/14 07:00 | 19 | [96] Mikhail Kukushkin v Lorenzo Giustino [162] | 6-2,6-2 | |
| ATP - Dubai | 03/13 10:55 | 14 | [322] Andrea Vavassori v Lorenzo Giustino [162] | 3-6,3-6 | |
| Challenger - Biella | 03/11 10:30 | 26 | [216] Brayden Schnur v Lorenzo Giustino [162] | 6-4,6-2 | |
| Challenger - Biella | 03/09 15:05 | 25 | [162] Lorenzo Giustino v Yasutaka Uchiyama [109] | 7-5,6-4 | |
| Challenger - Gran Canaria | 03/02 10:00 | 25 | [160] Lorenzo Giustino v Enzo Couacaud [187] | 6-7,7-5,1-6 | |
| Challenger - Gran Canaria | 02/23 10:00 | 25 | [158] Lorenzo Giustino v Roberto Ortega-Olmedo [297] | 6-1,3-6,4-6 | |
| Challenger - Biella | 02/12 12:40 | 27 | [212] Illya Marchenko v Lorenzo Giustino [157] | 6-2,2-6,7-5 | |
| Challenger - Biella | 02/11 10:30 | 26 | [182] Roberto Marcora v Lorenzo Giustino [157] | 6-7,5-7 | |
| Challenger - Biella | 02/09 16:25 | 25 | [337] Jelle Sels v Lorenzo Giustino [157] | 4-6,3-6 | |
| Challenger - Antalya | 02/01 13:50 | 25 | [118] Thiago Seyboth Wild v Lorenzo Giustino [154] | 6-4,6-3 | |
| Challenger - Antalya | 01/28 08:40 | 25 | [224] Zdenek Kolar v Lorenzo Giustino [154] | 6-3,3-6,7-5 | |
| Challenger - Istanbul | 01/21 07:00 | 26 | [151] Lorenzo Giustino v Antoine Hoang [121] | 4-6,4-6 | |
| Challenger - Istanbul | 01/18 11:25 | 25 | [151] Lorenzo Giustino v Alessandro Giannessi [162] | 7-5,7-6 | |
| Australian Open | 01/12 07:30 | 15 | [223] Borna Gojo v Lorenzo Giustino [151] | 6-3,7-6 | |
| Australian Open | 01/10 07:30 | 60 | [183] Denis Istomin v Lorenzo Giustino [151] | 1-6,1-6 | |
| Challenger - Maia | 11/30 12:45 | 25 | [374] Duje Ajdukovic v Lorenzo Giustino [149] | 7-5,6-2 | |
| Challenger - Bratislava | 11/12 13:10 | 26 | [316] Lukas Klein v Lorenzo Giustino [147] | 6-4,6-3 | |
| Challenger - Bratislava | 11/10 09:00 | 25 | [169] Yannick Maden v Lorenzo Giustino [147] | 5-7,6-3,4-6 | |
| Challenger - Marbella | 10/29 15:15 | 26 | [146] Lorenzo Giustino v Jaume Munar [108] | 1-6,3-6 | |
| Challenger - Marbella | 10/27 11:30 | 25 | [136] Carlos Alcaraz v Lorenzo Giustino [145] | 6-3,5-7,4-6 | |
| Challenger - Istanbul | 10/19 08:30 | 25 | [336] Altug Celikbilek v Lorenzo Giustino [140] | 6-0,6-3 | |
| Challenger - Alicante | 10/12 12:15 | 25 | [203] Liam Broady v Lorenzo Giustino [140] | 7-5,6-3 | |
| Challenger - Barcelona | 10/08 12:55 | 26 | [157] Lorenzo Giustino v Filip Horansky [177] | 3-6,6-3,2-6 | |
| Challenger - Barcelona | 10/06 11:30 | 25 | [223] Francisco Cerundolo v Lorenzo Giustino [157] | 1-6,4-6 | |
| French Open | 09/30 11:45 | 24 | [157] Lorenzo Giustino v Diego Schwartzman [14] | 1-6,5-7,0-6 | |
| French Open | 09/27 17:10 | 23 | [70] Corentin Moutet v Lorenzo Giustino [156] | 6-0,6-7,6-7,6-2,16-18 | |
| French Open | 09/24 11:00 | 19 | [246] Dustin Brown v Lorenzo Giustino [156] | 3-6,5-7 |
Lorenzo Giustino (* 10. September 1991 in Neapel) ist ein italienischer Tennisspieler.