| Challenger Perugia | 07/06 11:10 | 25 | [325] Timofey Skatov v Lorenzo Giustino [228] | 1-6,7-6,6-0 | |
| Challenger Porto | 06/29 11:25 | 25 | [228] Lorenzo Giustino v Frederico Ferreira Silva [176] | 4-6,6-4,3-6 | |
| Wimbledon | 06/22 11:35 | 14 | [215] Lorenzo Giustino v Illya Marchenko [155] | 5-7,6-7 | |
| Challenger Almaty | 06/15 09:10 | 25 | [215] Lorenzo Giustino v Pavel Kotov [270] | 6-7,4-6 | |
| Challenger Almaty | 06/07 05:35 | 25 | [178] Lorenzo Giustino v Timofey Skatov [399] | 4-6,6-3,2-6 | |
| Challenger Biella | 06/03 11:30 | 26 | [237] Marco Trungelliti v Lorenzo Giustino [178] | 6-4,6-2 | |
| Challenger Biella | 06/01 13:30 | 25 | Luca Nardi v Lorenzo Giustino | Retired | |
| Open di Francia | 05/25 14:25 | 14 | [178] Lorenzo Giustino v Zhizhen Zhang [175] | 7-5,5-7,2-6 | |
| ATP Ginevra | 05/16 13:10 | 19 | [104] Pablo Cuevas v Lorenzo Giustino [174] | 6-2,6-4 | |
| ATP Ginevra | 05/15 11:00 | 14 | [174] Lorenzo Giustino v Peter Gojowczyk [132] | 6-2,6-3 | |
| Challenger Biella | 05/04 08:00 | 25 | [242] Dimitar Kuzmanov v Lorenzo Giustino [175] | 6-3,1-6,6-3 | |
| Challenger Biella | 05/04 08:00 | 25 | [208] Aleksandar Vukic v Lorenzo Giustino [175] | Cancelled | |
| Challenger Roma | 04/29 14:40 | 26 | [210] Cem Ilkel v Lorenzo Giustino [174] | 6-4,6-2 | |
| Challenger Roma | 04/27 12:25 | 25 | [174] Lorenzo Giustino v Juan P Varillas [150] | 6-1,7-5 | |
| Challenger Roma | 04/23 13:05 | 27 | [179] Lorenzo Giustino v Vit Kopriva [287] | 6-1,5-7,3-6 | |
| Challenger Roma | 04/22 09:00 | 26 | [179] Lorenzo Giustino v Sergiy Stakhovsky [211] | 6-4,6-4 | |
| Challenger Roma | 04/21 09:00 | 25 | [179] Lorenzo Giustino v Filip Horansky [178] | 7-6,7-5 | |
| Challenger Spalato | 04/13 15:20 | 25 | [204] Andrea Collarini v Lorenzo Giustino [168] | 6-4,6-4 | |
| ATP Marbella | 04/05 10:00 | 19 | [135] Henri Laaksonen v Lorenzo Giustino [170] | 7-5,3-6,6-1 | |
| ATP Marbella | 04/04 10:00 | 14 | [190] Roberto Marcora v Lorenzo Giustino [164] | 6-7,4-6 | |
| 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 |
Lorenzo Giustino (Napoli, 10 settembre 1991) è un tennista italiano.