| Challenger Barcelona | 04/06 09:00 | 28 | [354] 기우스티노, 로렌조 v 자파타 미랄레스, 베르나베 [143] | Retired | |
| Challenger Barcelona | 04/05 09:00 | 27 | [354] 기우스티노, 로렌조 v 데 종, 제스퍼 [155] | 7-5,6-4 | |
| Challenger Barcelona | 04/03 10:10 | 26 | [187] 사치코, 비탈리 v 기우스티노, 로렌조 [354] | 4-6,2-6 | |
| Challenger Barcelona | 04/02 11:40 | 25 | [218] 노바크, 데니스 v 기우스티노, 로렌조 [354] | Retired | |
| Challenger Barcelona | 04/01 13:05 | 19 | [372] Weber, Arthur v 기우스티노, 로렌조 [354] | 5-7,5-7 | |
| Challenger Barcelona | 03/31 09:40 | 14 | [408] Carlos Lopez Montagud v 기우스티노, 로렌조 [388] | 3-6,5-7 | |
| ITF M25 Tarragona | 03/30 10:50 | 28 | [437] Buse, Ignacio v 기우스티노, 로렌조 [388] | 6-4,6-2 | |
| ITF M25 Tarragona | 03/29 12:40 | 27 | 기우스티노, 로렌조 v Svyatoslav Gulin | 6-7,6-3,6-3 | |
| ITF M25 Tarragona | 03/28 15:20 | 26 | 기우스티노, 로렌조 v 알칼라 구리, 맥스 | 6-2,7-5 | |
| ITF M25 Tarragona | 03/27 15:45 | 25 | 기우스티노, 로렌조 v Manzanera Pertusa, Alejandro | 6-2,7-6 | |
| ITF M25 Badalona | 03/24 10:00 | 29 | [499] 마르티 푸졸라스, 알렉스 v 기우스티노, 로렌조 [388] | 6-3,4-6,3-6 | |
| ITF M25 Badalona | 03/23 09:00 | 28 | [358] 클라르크, 제이 v 기우스티노, 로렌조 [388] | 3-6,2-6 |
Lorenzo Giustino (Italian pronunciation: [loˈrɛntso dʒuˈstiːno]; born 10 September 1991, in Naples) is an Italian tennis player.
Giustino has a career-high ATP singles ranking of 127 achieved on 12 August 2019 and a career-high ATP doubles ranking of 311 achieved on 15 April 2019.
Giustino made his ATP main draw debut at the 2015 BRD Năstase Țiriac Trophy, where he qualified for the main draw.
Giustino made his Grand Slam debut at the 2020 Australian Open. He defeated Frenchman Corentin Moutet 0–6, 7–6 (7), 7–6 (3), 2–6, 18–16 in the first round of 2020 French Open as a first time main draw qualifier at this Major. The match was the second-longest in French Open history, lasting 6 hours, 5 minutes. It was his first ATP tour-level win.
He qualified for his first ATP 500 tournament at the 2021 Dubai Tennis Championships as a lucky loser receiving a bye into the second round after the withdrawal of tenth seed Borna Ćorić.
He qualified for his second ATP 500 at the 2023 Barcelona Open Banc Sabadell.