| Challenger Barletta | 04/12 11:50 | 25 | [179] Enzo Couacaud v Lorenzo Giustino [216] | 6-4,6-4 | |
| Challenger Murcia | 04/07 12:10 | 26 | [213] Lorenzo Giustino v Ivan Gakhov [465] | 4-6,3-6 | |
| Challenger Murcia | 04/04 16:10 | 25 | [213] Lorenzo Giustino v Johan Nikles [291] | 7-6,4-6,6-4 | |
| Challenger Oeiras | 03/29 12:30 | 25 | [256] Riccardo Bonadio v Lorenzo Giustino [208] | 6-2,6-7,6-0 | |
| Challenger Zadar | 03/23 11:50 | 26 | [255] Duje Ajdukovic v Lorenzo Giustino [208] | 6-4,7-6 | |
| Challenger Zadar | 03/22 10:55 | 25 | [207] Lorenzo Giustino v Zsombor Piros [240] | 6-4,5-7,7-5 | |
| Challenger Roseto | 03/14 14:15 | 25 | [169] Franco Agamenone v Lorenzo Giustino [207] | 5-7,7-5,6-4 | |
| Challenger Roseto | 03/07 13:55 | 25 | [105] Carlos Taberner v Lorenzo Giustino [207] | 6-2,6-4 | |
| Challenger Gran Canaria | 03/01 10:00 | 25 | [299] Nikolas S Izquierdo v Lorenzo Giustino [208] | 6-2,6-2 | |
| Challenger Forli | 02/21 14:45 | 25 | [214] Lorenzo Giustino v Filip Horansky [208] | 7-6,4-6,3-6 | |
| Challenger Forli | 02/14 16:00 | 25 | [217] Lorenzo Giustino v Nuno Borges [189] | 6-7,3-6 | |
| Australian Open | 01/10 08:10 | 14 | [205] Lorenzo Giustino v Jason Kubler [203] | 6-3,4-6,0-6 | |
| Challenger Bendigo | 01/05 01:30 | 25 | [207] Lorenzo Giustino v Hugo Grenier [150] | 6-7,0-6 | |
| Challenger Bendigo | 01/03 06:00 | 24 | Lorenzo Giustino v Charlie Camus | 7-6,6-3 | |
| Challenger Bendigo | 01/03 06:00 | 24 | Lorenzo Giustino v Li Tu | Cancelled | |
| Challenger Roanne | 11/08 18:25 | 25 | [210] Lorenzo Giustino v Richard Gasquet [74] | 4-6,3-6 | |
| Challenger Tenerife | 11/03 14:00 | 26 | [165] Fernando Verdasco v Lorenzo Giustino [211] | 6-2,6-2 | |
| Challenger Tenerife | 11/02 12:35 | 25 | Daniel Rincon v Lorenzo Giustino | 3-6,5-7 | |
| Challenger Napoli | 10/15 11:20 | 27 | [243] Flavio Cobolli v Lorenzo Giustino [213] | 6-4,3-6,7-5 | |
| Challenger Napoli | 10/13 12:10 | 26 | [213] Lorenzo Giustino v Andrej Martin [120] | 6-4,5-7,7-5 | |
| Challenger Napoli | 10/11 14:20 | 25 | [213] Lorenzo Giustino v Nino Serdarusic [235] | 6-4,6-1 | |
| Challenger Napoli | 10/05 12:25 | 25 | [212] Lorenzo Giustino v Riccardo Bonadio [297] | 6-3,1-6,1-6 | |
| Challenger Lisbon | 09/28 12:05 | 25 | [187] Dmitry Popko v Lorenzo Giustino [213] | Retired | |
| Challenger Bukareszt | 09/25 08:00 | 28 | [204] Filip Horansky v Lorenzo Giustino [229] | 6-3,4-6,6-2 | |
| Challenger Bukareszt | 09/24 08:00 | 27 | [229] Lorenzo Giustino v Riccardo Bonadio [305] | 6-2,6-3 | |
| Challenger Bukareszt | 09/22 10:45 | 26 | [229] Lorenzo Giustino v Matteo Arnaldi [476] | 2-6,7-5,6-4 | |
| Challenger Bukareszt | 09/20 10:00 | 25 | [185] Sumit Nagal v Lorenzo Giustino [229] | 6-3,5-7,5-7 | |
| Challenger Stambuł | 09/14 11:40 | 25 | [80] James Duckworth v Lorenzo Giustino [229] | 7-5,6-1 | |
| Challenger Sewilla | 09/06 17:00 | 25 | [238] Lorenzo Giustino v Flavio Cobolli [281] | 0-6,2-6 | |
| US Open | 08/25 19:40 | 14 | [237] Lorenzo Giustino v Aleksandar Kovacevic [410] | 6-3,6-7,1-6 |
Lorenzo Giustino (ur. 10 września 1991 w Neapolu) – włoski tenisista.