| Challenger Almaty | 06/06 06:00 | 26 | [211] Santiago Giraldo v Lorenzo Giustino [159] | 1-6,3-6 | |
| Challenger Almaty | 06/04 10:30 | 25 | [301] Nino Serdarusic v Lorenzo Giustino [159] | 6-3,3-6,2-6 | |
| Challenger Vicenza | 05/31 12:40 | 26 | [159] Lorenzo Giustino v Benjamin Hassan [349] | 1-6,3-6 | |
| Challenger Vicenza | 05/30 16:30 | 25 | [159] Lorenzo Giustino v Gonzalo Escobar [321] | 6-7,6-2,7-5 | |
| French Open | 05/20 15:20 | 44 | [209] Pedja Krstin v Lorenzo Giustino [157] | 6-4,6-2 | |
| Challenger Lisbon | 05/18 10:40 | 28 | [165] Lorenzo Giustino v Facundo Bagnis [144] | Retired | |
| Challenger Lisbon | 05/17 12:00 | 27 | [473] Sandro Ehrat v Lorenzo Giustino [165] | 5-7,6-3,2-6 | |
| Challenger Lisbon | 05/16 09:00 | 26 | [165] Lorenzo Giustino v Bjorn Fratangelo [136] | 6-4,2-6,6-2 | |
| Challenger Lisbon | 05/15 09:00 | 25 | [165] Lorenzo Giustino v Zdenek Kolar [213] | 6-4,6-2 | |
| Challenger Aix en Provence | 05/07 16:25 | 25 | [161] Lorenzo Giustino v Viktor Troicki [252] | 6-4,2-6,4-6 | |
| ATP Estoril | 04/27 11:00 | 64 | [86] Daniel Evans v Lorenzo Giustino [164] | 6-3,7-5 | |
| Challenger Tunis | 04/20 13:15 | 28 | [81] Pablo Cuevas v Lorenzo Giustino [173] | 6-2,6-4 | |
| Challenger Tunis | 04/19 13:20 | 27 | [212] Facundo Arguello v Lorenzo Giustino [173] | 6-2,3-6,4-6 | |
| Challenger Tunis | 04/18 13:25 | 26 | [173] Lorenzo Giustino v Johan Tatlot [260] | 6-1,5-7,6-3 | |
| Challenger Tunis | 04/16 10:35 | 25 | [173] Lorenzo Giustino v Zdenek Kolar [219] | 6-1,6-3 | |
| Challenger Barletta | 04/11 11:30 | 26 | [487] Jacopo Berrettini v Lorenzo Giustino [169] | 4-6,7-6,6-4 | |
| Challenger Barletta | 04/10 10:55 | 25 | [359] Andrea Pellegrino v Lorenzo Giustino [169] | Retired | |
| Challenger Alicante | 04/03 08:00 | 25 | [167] Lorenzo Giustino v Elias Ymer [115] | 6-2,4-6,2-6 | |
| Challenger Alicante | 04/01 16:30 | 24 | [284] Goncalo Oliveira v Lorenzo Giustino [167] | 6-3,4-6,3-6 | |
| Challenger Zhangjiagang | 03/24 04:40 | 29 | [189] Lorenzo Giustino v Marc Polmans [200] | 4-6,6-4,6-7 | |
| Challenger Zhangjiagang | 03/23 06:15 | 28 | Viktor Galovic v Lorenzo Giustino | Walkover | |
| Challenger Zhangjiagang | 03/22 04:15 | 27 | [169] Soonwoo Kwon v Lorenzo Giustino [189] | 3-6,2-6 | |
| Challenger Zhangjiagang | 03/21 07:45 | 26 | [257] Max Purcell v Lorenzo Giustino [189] | 3-6,4-6 | |
| Challenger Zhangjiagang | 03/19 05:45 | 25 | Daniel Nguyen v Lorenzo Giustino | 0-6,3-6 | |
| Challenger Shenzhen | 03/14 11:30 | 26 | [106] Brayden Schnur v Lorenzo Giustino [189] | 4-6,7-5,6-2 | |
| Challenger Shenzhen | 03/12 05:45 | 25 | [406] Javier Barranco Cosano v Lorenzo Giustino [189] | 3-6,4-6 | |
| Challenger Pau | 02/27 11:40 | 25 | [275] Lucas Miedler v Lorenzo Giustino [189] | 4-6,7-6,6-4 | |
| Challenger Bergamo | 02/21 10:40 | 26 | [152] Luca Vanni v Lorenzo Giustino [185] | 6-3,6-1 | |
| Challenger Bergamo | 02/19 12:45 | 25 | [222] Zdenek Kolar v Lorenzo Giustino [185] | 2-6,1-6 | |
| Challenger Launceston | 02/03 01:30 | 29 | [111] Lloyd Harris v Lorenzo Giustino [227] | 6-2,6-2 |
Lorenzo Giustino (ur. 10 września 1991 w Neapolu) – włoski tenisista.