| Challenger San Benedetto | 07/20 17:00 | 27 | [210] Andrea Arnaboldi v Lorenzo Giustino [247] | 3-6,4-6 | |
| Challenger San Benedetto | 07/18 15:20 | 26 | [251] Tomislav Brkic v Lorenzo Giustino [247] | 1-6,6-7 | |
| Challenger San Benedetto | 07/16 17:20 | 25 | [247] Lorenzo Giustino v Ricardo Ojeda Lara [195] | 6-3,6-0 | |
| Challenger Recanati | 07/06 17:45 | 27 | [146] Adrian Menendez-Maceiras v Lorenzo Giustino [258] | 6-4,6-2 | |
| Challenger Recanati | 07/05 19:00 | 26 | [258] Lorenzo Giustino v Antoine Hoang [231] | 6-3,6-7,6-0 | |
| Challenger Recanati | 07/03 17:50 | 25 | [258] Lorenzo Giustino v Andrea Basso [317] | 4-6,6-4,6-4 | |
| Challenger Milan | 06/27 13:00 | 26 | [266] Lorenzo Giustino v Joao Domingues [258] | 6-7,2-6 | |
| Challenger Milan | 06/25 12:30 | 25 | [266] Lorenzo Giustino v Maximilian Neuchrist [273] | 6-3,6-2 | |
| Challenger Blois | 06/19 08:30 | 25 | [282] Scott Griekspoor v Lorenzo Giustino [266] | 6-4,6-1 | |
| Challenger Shymkent | 06/08 08:00 | 28 | [138] Yannick Hanfmann v Lorenzo Giustino [264] | 6-1,6-0 | |
| Challenger Shymkent | 06/07 07:30 | 27 | [264] Lorenzo Giustino v Kevin Krawietz [358] | 7-5,4-6,6-3 | |
| Challenger Shymkent | 06/06 08:10 | 26 | [182] Mohamed Safwat v Lorenzo Giustino [264] | 4-6,7-6,4-6 | |
| Challenger Shymkent | 06/05 08:20 | 25 | [225] Danilo Petrovic v Lorenzo Giustino [264] | Retired | |
| Challenger Mestre | 05/25 13:50 | 27 | [276] Lorenzo Giustino v Gianluigi Quinzi [243] | 6-2,6-7,3-6 | |
| Challenger Mestre | 05/24 09:00 | 26 | [276] Lorenzo Giustino v Liam Caruana [418] | 6-1,6-1 | |
| Challenger Mestre | 05/21 13:25 | 25 | [276] Lorenzo Giustino v Carlos Gomez-Herrera [271] | 7-5,6-4 | |
| Challenger Lisbon | 05/17 16:50 | 26 | [129] Pedro Sousa v Lorenzo Giustino [255] | 6-2,6-0 | |
| Challenger Lisbon | 05/15 17:05 | 25 | [255] Lorenzo Giustino v Joris De Loore [343] | 7-5,1-6,7-6 | |
| Challenger Braga | 05/09 10:00 | 26 | [253] Lorenzo Giustino v Alex De Minaur [109] | 5-7,7-5,2-6 | |
| Challenger Braga | 05/07 13:30 | 25 | [253] Lorenzo Giustino v Scott Griekspoor [278] | 4-6,6-3,6-3 | |
| Challenger Ostrava | 05/02 10:30 | 26 | [265] Gianluigi Quinzi v Lorenzo Giustino [250] | 6-3,6-2 | |
| Challenger Ostrava | 04/30 15:15 | 25 | Lorenzo Giustino v Patrik Rikl | 6-3,7-6 | |
| ATP Barcelona Qual | 04/21 11:10 | 45 | [267] Lorenzo Giustino v Jozef Kovalik [152] | 7-6,2-6,5-7 | |
| ITF Spain F9 | 04/19 13:40 | 26 | [267] Lorenzo Giustino v Javier Barranco Cosano [457] | 4-6,6-7 | |
| ITF Spain F9 | 04/17 10:25 | 25 | Lorenzo Giustino v Omar Salman | 6-1,6-1 | |
| ITF Italy F7 | 04/14 12:00 | 29 | [408] Gianluca Mager v Lorenzo Giustino [234] | 4-6,1-6 | |
| ITF Italy F7 | 04/13 13:30 | 28 | [234] Lorenzo Giustino v Andrea Collarini [224] | 2-6,6-4,7-5 | |
| ITF Italy F7 | 04/12 14:50 | 27 | [454] Bruno Sant'anna v Lorenzo Giustino [234] | 3-6,5-7 | |
| ITF Italy F7 | 04/11 14:00 | 26 | [393] Lenny Hampel v Lorenzo Giustino [234] | 1-6,4-6 | |
| ITF Italy F7 | 04/10 14:45 | 25 | Billy Harris v Lorenzo Giustino | 1-6,0-6 |
Lorenzo Giustino (ur. 10 września 1991 w Neapolu) – włoski tenisista.