| Italian National Tour | 07/01 13:05 | 1 | [153] Lorenzo Giustino v Andrea Vavassori [303] | 7-5,4-6,7-5 | |
| Italian National Tour | 06/30 12:05 | 1 | Lorenzo Giustino v Federico Arnaboldi | 6-4,6-0 | |
| Italian Umbrian Open | 06/27 13:15 | 1 | [46] Lorenzo Sonego v Lorenzo Giustino [153] | 6-4,7-6 | |
| Italian Umbrian Open | 06/26 16:12 | - | [153] Lorenzo Giustino v Giovanni Fonio [490] | 7-6,5-4 | |
| Italian Umbrian Open | 06/26 14:01 | - | Lorenzo Giustino v Giovanni Fonio | View | |
| Italian Umbrian Open | 06/24 10:35 | 1 | [153] Lorenzo Giustino v Alessandro Bega [353] | 6-1,6-4 | |
| Italian Umbrian Open | 06/22 09:49 | - | [153] Lorenzo Giustino v Riccardo Bonadio [409] | 6-0,6-7,0-0 | |
| Challenger Monterrey | 03/05 17:00 | 26 | [120] Jason Jung v Lorenzo Giustino [153] | 6-1,6-2 | |
| Challenger Monterrey | 03/03 22:00 | 25 | [231] Christopher Eubanks v Lorenzo Giustino [153] | 6-3,4-6,4-6 | |
| Challenger Pau | 02/27 12:35 | 26 | Jerzy Janowicz v Lorenzo Giustino | 6-4,6-7,6-3 | |
| Challenger Pau | 02/25 19:50 | 25 | [276] Borna Gojo v Lorenzo Giustino [153] | 6-7,6-7 | |
| Challenger Bergamo | 02/20 10:20 | 26 | [154] Lorenzo Giustino v Hugo Gaston [248] | 3-6,6-3,4-6 | |
| Challenger Bergamo | 02/18 19:55 | 25 | [154] Lorenzo Giustino v Nino Serdarusic [296] | 6-7,6-3,7-6 | |
| Challenger Launceston | 02/07 02:10 | 27 | [158] Lorenzo Giustino v Kimmer Coppejans [162] | 6-7,7-5,4-6 | |
| Challenger Launceston | 02/06 03:40 | 26 | Lorenzo Giustino v Dane Sweeny | 6-2,6-3 | |
| Challenger Launceston | 02/04 23:00 | 25 | [158] Lorenzo Giustino v Blaz Kavcic [281] | 0-6,7-5,7-6 | |
| Challenger Burnie | 01/30 01:30 | 26 | [150] Lorenzo Giustino v Zhe Li [206] | 4-6,2-6 | |
| Challenger Burnie | 01/28 03:00 | 25 | [150] Lorenzo Giustino v Andrea Vavassori [289] | 6-3,6-3 | |
| Australian Open | 01/21 01:35 | 23 | [150] Lorenzo Giustino v Milos Raonic [35] | 2-6,1-6,3-6 | |
| Australian Open | 01/18 03:50 | 46 | [202] Marco Trungelliti v Lorenzo Giustino [149] | 6-2,1-6,7-6 | |
| Australian Open | 01/17 02:20 | 45 | [149] Lorenzo Giustino v Yannick Maden [124] | 6-7,6-2,6-4 | |
| Australian Open | 01/15 23:00 | 44 | [149] Lorenzo Giustino v Yan Bai [218] | 6-3,7-5 | |
| Challenger Canberra | 01/06 06:35 | 24 | [162] Oscar Otte v Lorenzo Giustino [149] | 5-7,6-1,6-4 | |
| Challenger Lima | 10/23 17:25 | 25 | [226] Rafael Matos v Lorenzo Giustino [147] | Retired | |
| Challenger Barcellona | 10/02 15:00 | 25 | [227] Carlos Taberner v Lorenzo Giustino [142] | 6-4,6-0 | |
| Challenger Firenze | 09/25 13:20 | 25 | [244] Mohamed Safwat v Lorenzo Giustino [144] | 6-3,2-6,6-3 | |
| Challenger Biella | 09/17 14:30 | 25 | [219] Andrea Collarini v Lorenzo Giustino [141] | 7-6,5-7,6-3 | |
| Challenger Szczecin | 09/11 08:00 | 25 | [138] Lorenzo Giustino v Jozef Kovalik [346] | 7-6,6-7,1-6 | |
| Challenger Genova | 09/03 10:00 | 25 | [128] Lorenzo Giustino v Giulio Zeppieri [470] | 3-6,2-6 | |
| Challenger Como | 08/27 12:00 | 25 | [128] Lorenzo Giustino v Facundo Mena [266] | 3-6,2-6 |
Lorenzo Giustino (Napoli, 10 settembre 1991) è un tennista italiano.