| Challenger Barcellona | 04/06 09:00 | 28 | [354] Lorenzo Giustino v Bernabe Zapata Miralles [143] | Retired | |
| Challenger Barcellona | 04/05 09:00 | 27 | [354] Lorenzo Giustino v Jesper De Jong [155] | 7-5,6-4 | |
| Challenger Barcellona | 04/03 10:10 | 26 | [187] Vitaliy Sachko v Lorenzo Giustino [354] | 4-6,2-6 | |
| Challenger Barcellona | 04/02 11:40 | 25 | [218] Dennis Novak v Lorenzo Giustino [354] | Retired | |
| Challenger Barcellona | 04/01 13:05 | 19 | [372] Arthur Weber v Lorenzo Giustino [354] | 5-7,5-7 | |
| Challenger Barcellona | 03/31 09:40 | 14 | [408] Carlos Lopez Montagud v Lorenzo Giustino [388] | 3-6,5-7 | |
| ITF M25 Tarragona | 03/30 10:50 | 28 | [437] Ignacio Buse v Lorenzo Giustino [388] | 6-4,6-2 | |
| ITF M25 Tarragona | 03/29 12:40 | 27 | Lorenzo Giustino v Svyatoslav Gulin | 6-7,6-3,6-3 | |
| ITF M25 Tarragona | 03/28 15:20 | 26 | Lorenzo Giustino v Max Alcala Gurri | 6-2,7-5 | |
| ITF M25 Tarragona | 03/27 15:45 | 25 | Lorenzo Giustino v Alejandro Manzanera Pertusa | 6-2,7-6 | |
| ITF M25 Badalona | 03/24 10:00 | 29 | [499] Alex M Pujolras v Lorenzo Giustino [388] | 6-3,4-6,3-6 | |
| ITF M25 Badalona | 03/23 09:00 | 28 | [358] Jay Clarke v Lorenzo Giustino [388] | 3-6,2-6 | |
| ITF M25 Badalona | 03/22 10:00 | 27 | Lorenzo Giustino v Peter Benjamin Privara | 6-0,6-3 | |
| ITF M25 Badalona | 03/21 10:30 | 26 | Lorenzo Giustino v Carlos Gimeno Valero | Walkover | |
| ITF M25 Badalona | 03/20 11:10 | 25 | Lorenzo Giustino v David Puig Molina | 6-3,6-1 | |
| ITF M25 Vale Do Lobo | 03/13 12:05 | 25 | Lorenzo Giustino v Andres F Canovas | 3-6,4-6 | |
| ITF M25 Quinta Do Lago | 03/07 14:00 | 26 | Keegan Smith v Lorenzo Giustino | 6-2,5-7,6-4 | |
| ITF M25 Quinta Do Lago | 03/06 12:35 | 25 | Joao Domingues v Lorenzo Giustino | 3-6,0-6 | |
| Challenger Tenerife | 02/18 10:00 | 14 | [277] Giovanni Fonio v Lorenzo Giustino [330] | 4-6,6-4,6-1 | |
| Challenger Cherbourg | 02/12 17:10 | 25 | [330] Lorenzo Giustino v Mattia Bellucci [193] | 6-7,3-6 | |
| Challenger Nottingham | 02/06 10:30 | 25 | [183] Alexander Ritschard v Lorenzo Giustino [329] | 6-4,6-3 | |
| Challenger Quimper | 01/22 11:20 | 14 | Lorenzo Giustino v Emilien Voisin | 6-3,3-6,4-6 | |
| Challenger Tenerife | 01/15 10:00 | 19 | [300] Lorenzo Giustino v Samuel Vincent Ruggeri [337] | 2-6,3-6 | |
| Challenger Tenerife | 01/14 11:20 | 14 | [288] Lorenzo Giustino v Alberto Barroso Campos [380] | 6-4,6-2 | |
| Challenger Oeiras | 01/10 15:40 | 26 | [244] Joao Sousa v Lorenzo Giustino [288] | 6-3,6-1 | |
| Challenger Oeiras | 01/09 13:30 | 25 | [288] Lorenzo Giustino v Michael Vrbensky [301] | 6-4,2-6,7-5 | |
| Challenger Oeiras | 01/04 15:00 | 26 | [322] Thai-Son Kwiatkowski v Lorenzo Giustino [287] | 6-4,6-4 | |
| Challenger Oeiras | 01/01 17:20 | 25 | [287] Lorenzo Giustino v Michael Vrbensky [300] | 7-5,4-6,6-4 | |
| Challenger Maspalomas | 11/27 13:45 | 25 | [386] Gerard Campana Lee v Lorenzo Giustino [276] | 4-6,6-1,6-3 | |
| Challenger Valencia | 11/19 12:30 | 14 | Nicolas Alvarez Varona v Lorenzo Giustino | 6-4,6-4 |
Lorenzo Giustino (Napoli, 10 settembre 1991) è un tennista italiano.