| Challenger Vicenza | 05/28 12:00 | 14 | [250] Lorenzo Giustino v Daniel Dutra Da Silva [327] | 6-4,4-6,6-1 | |
| Open di Francia | 05/22 11:00 | 14 | [248] Lorenzo Giustino v Frederico Ferreira Silva [225] | 7-6,6-7,1-6 | |
| Challenger Francavilla | 05/13 10:00 | 28 | [267] Lorenzo Giustino v Benoit Paire [160] | 3-6,2-6 | |
| Challenger Francavilla | 05/12 11:55 | 27 | [217] Raphael Collignon v Lorenzo Giustino [267] | 6-7,2-6 | |
| Challenger Francavilla | 05/10 09:30 | 26 | [267] Lorenzo Giustino v Dimitar Kuzmanov [211] | 1-6,7-6,6-2 | |
| Challenger Francavilla | 05/08 14:00 | 25 | [267] Lorenzo Giustino v Mikhail Kukushkin [293] | 7-5,6-1 | |
| Challenger Aix en Provence | 05/01 11:00 | 14 | [403] Benjamin Lock v Lorenzo Giustino [229] | 0-6,6-4,7-5 | |
| Challenger Ostrava | 04/26 10:25 | 25 | [496] Jiri Vesely v Lorenzo Giustino [229] | 6-3,6-7,6-2 | |
| ATP Barcellona | 04/18 09:00 | 24 | [223] Lorenzo Giustino v Alexander Shevchenko [98] | 2-6,2-6 | |
| ATP Barcellona | 04/16 10:15 | 19 | [224] Lorenzo Giustino v Geoffrey Blancaneaux [170] | 6-3,1-6,7-6 | |
| ATP Barcellona | 04/15 08:00 | 14 | [114] Otto Virtanen v Lorenzo Giustino [224] | 7-6,4-6,4-6 | |
| Challenger Madrid | 04/12 12:25 | 26 | [194] Andrea Collarini v Lorenzo Giustino [224] | 6-2,3-6,6-2 | |
| Challenger Madrid | 04/10 13:10 | 25 | [252] Omar Jasika v Lorenzo Giustino [221] | 4-6,6-4,2-6 | |
| Challenger Murcia | 04/04 09:00 | 25 | [274] Pablo Llamas Ruiz v Lorenzo Giustino [221] | 6-2,6-2 | |
| Challenger Girona | 03/27 13:30 | 25 | [323] Pablo Llamas Ruiz v Lorenzo Giustino [219] | 7-5,4-6,6-4 | |
| Challenger Las Franquesas del Valles | 03/23 11:05 | 26 | [219] Lorenzo Giustino v Ivan Gakhov [241] | 2-6,5-7 | |
| Challenger Las Franquesas del Valles | 03/21 15:00 | 25 | [219] Lorenzo Giustino v Rudolf Molleker [326] | 6-3,5-7,7-6 | |
| Challenger Pune | 03/01 05:30 | 26 | [223] Lorenzo Giustino v Luca Nardi [151] | 7-6,0-6,4-6 | |
| Challenger Pune | 02/28 05:00 | 25 | [245] Nam Hoang Ly v Lorenzo Giustino [223] | 1-6,1-6 | |
| Challenger Bangalore | 02/21 07:15 | 25 | [223] Lorenzo Giustino v James McCabe [346] | 2-6,6-7 | |
| Challenger Manama | 02/17 09:00 | 27 | [243] Lorenzo Giustino v Salvatore Caruso [380] | 5-7,2-6 | |
| Challenger Manama | 02/15 12:35 | 26 | [108] Francesco Passaro v Lorenzo Giustino [243] | 5-7,3-6 | |
| Challenger Manama | 02/14 08:00 | 25 | Lorenzo Giustino v Mohamed Safwat | 6-4,6-4 | |
| Challenger Tenerife | 01/31 15:50 | 25 | [245] Lorenzo Giustino v Oleksii Krutykh [176] | 2-6,0-6 | |
| Challenger Tenerife | 01/30 10:00 | 19 | [245] Lorenzo Giustino v Gian Marco Moroni [347] | Retired | |
| Challenger Tenerife | 01/29 10:00 | 14 | [267] Lorenzo Giustino v Giovanni Fonio [366] | 6-3,6-4 | |
| Challenger Tenerife | 01/20 15:00 | 27 | [267] Lorenzo Giustino v Alexander Shevchenko [157] | 4-6,5-7 | |
| Challenger Tenerife | 01/19 15:00 | 26 | [220] Kimmer Coppejans v Lorenzo Giustino [267] | 3-6,3-6 | |
| Challenger Tenerife | 01/17 16:20 | 25 | [199] Stefan Kozlov v Lorenzo Giustino [267] | Retired | |
| Challenger Tenerife | 01/16 10:00 | 19 | [331] Alibek Kachmazov v Lorenzo Giustino [267] | 4-6,0-6 |
Lorenzo Giustino (Napoli, 10 settembre 1991) è un tennista italiano.