| 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 - Teneriffa | 01/31 15:50 | 25 | [245] Lorenzo Giustino v Oleksii Krutykh [176] | 2-6,0-6 | |
| Challenger - Teneriffa | 01/30 10:00 | 19 | [245] Lorenzo Giustino v Gian Marco Moroni [347] | Retired | |
| Challenger - Teneriffa | 01/29 10:00 | 14 | [267] Lorenzo Giustino v Giovanni Fonio [366] | 6-3,6-4 | |
| Challenger - Teneriffa | 01/20 15:00 | 27 | [267] Lorenzo Giustino v Alexander Shevchenko [157] | 4-6,5-7 | |
| Challenger - Teneriffa | 01/19 15:00 | 26 | [220] Kimmer Coppejans v Lorenzo Giustino [267] | 3-6,3-6 | |
| Challenger - Teneriffa | 01/17 16:20 | 25 | [199] Stefan Kozlov v Lorenzo Giustino [267] | Retired | |
| Challenger - Teneriffa | 01/16 10:00 | 19 | [331] Alibek Kachmazov v Lorenzo Giustino [267] | 4-6,0-6 | |
| Challenger - Teneriffa | 01/15 10:00 | 14 | [340] Maxime Janvier v Lorenzo Giustino [282] | 3-6,4-6 | |
| Challenger - Oeiras | 01/12 11:00 | 27 | [266] Joris De Loore v Lorenzo Giustino [282] | 6-2,6-4 | |
| Challenger - Oeiras | 01/11 11:00 | 26 | [282] Lorenzo Giustino v Jay Clarke [241] | 6-3,7-6 | |
| Challenger - Oeiras | 01/10 12:10 | 25 | [318] Elmar Ejupovic v Lorenzo Giustino [282] | 4-6,5-7 | |
| Challenger - Oeiras | 01/05 11:00 | 26 | [280] Raphael Collignon v Lorenzo Giustino [281] | 6-2,7-6 | |
| Challenger - Oeiras | 01/03 13:10 | 25 | [281] Lorenzo Giustino v Pol M Tiffon [293] | 6-1,3-6,6-3 | |
| Challenger - Maspalomas | 12/02 10:00 | 27 | [417] Pablo Llamas Ruiz v Lorenzo Giustino [305] | 6-4,7-6 | |
| Challenger - Maspalomas | 11/30 12:40 | 26 | [305] Lorenzo Giustino v Lukas Neumayer [304] | 6-3,7-5 | |
| Challenger - Maspalomas | 11/29 09:30 | 25 | [305] Lorenzo Giustino v Viktor Durasovic [342] | 7-5,6-4 | |
| Challenger - Ortisei | 10/25 13:30 | 25 | [167] Flavio Cobolli v Lorenzo Giustino [285] | 7-6,6-4 | |
| ATP - Neapel | 10/16 12:35 | 14 | [126] Francesco Passaro v Lorenzo Giustino [277] | 6-3,4-6,6-4 | |
| ATP - Gijón | 10/09 15:05 | 19 | [277] Lorenzo Giustino v Nicolas Alvarez Varona [228] | 2-6,2-6 | |
| ATP - Gijón | 10/08 16:15 | 14 | Dimitar Kuzmanov v Lorenzo Giustino | Walkover | |
| Challenger - Alicante | 10/05 09:00 | 26 | [277] Lorenzo Giustino v Fabian Marozsan [185] | 2-6,6-3,1-6 | |
| Challenger - Alicante | 10/04 09:00 | 25 | [352] Stuart Parker v Lorenzo Giustino [277] | 6-4,4-6,1-6 | |
| ATP - Tel Aviv | 09/25 08:55 | 14 | [443] Edan Leshem v Lorenzo Giustino [246] | 6-3,6-1 | |
| Challenger Braga | 09/19 14:00 | 25 | [152] Manuel Guinard v Lorenzo Giustino [246] | 6-2,6-4 | |
| Challenger - Istanbul | 09/15 10:30 | 26 | [263] Harold Mayot v Lorenzo Giustino [253] | 7-5,7-5 | |
| Challenger - Istanbul | 09/13 11:05 | 25 | [253] Lorenzo Giustino v Dominik Palan [477] | 6-2,6-2 | |
| Challenger - Sevilla | 09/05 15:00 | 25 | [256] Lorenzo Giustino v Facundo D Acosta [249] | 6-7,6-4,1-6 | |
| Challenger - Toulouse | 08/29 14:30 | 25 | [254] Frederico F Silva v Lorenzo Giustino [256] | 6-7,6-3,6-4 |
Lorenzo Giustino (* 10. September 1991 in Neapel) ist ein italienischer Tennisspieler.