Estadio: Lyttos Beach Tennis Academy
| Copa Davis | 2021/09/18 09:00 | Petros Tsitsipas v Ricardas Berankis | 1-6,3-6 |
| Challenger de Cassis | 2021/09/05 12:45 | Ramkumar Ramanathan v Petros Tsitsipas | 6-4,6-4 |
| ITF M15 Oldenzaal | 2021/08/19 11:20 | Daniel De Jonge v Petros Tsitsipas | 6-2,6-2 |
| ITF M15 Oldenzaal | 2021/08/18 15:00 | Petros Tsitsipas v Gabriel Alejandro Hidalgo | 7-5,6-2 |
| Challenger de Meerbusch | 2021/08/08 12:05 | Nerman Fatic v Petros Tsitsipas | 6-1,7-6 |
| ITF M25 Bolzano | 2021/08/04 08:25 | Petros Tsitsipas v Andrea Gola | 2-6,2-6 |
| ITF M25 Bolzano | 2021/08/03 15:35 | Petros Tsitsipas v Jonas Greif | 6-3,6-2 |
| ITF M25 Kottingbrunn | 2021/07/19 09:30 | Petros Tsitsipas v Raffael Schaer | 3-6,4-6 |
| Copa Davis | 2021/09/18 10:35 | Michail Pervolarakis v Laurynas Grigelis | 6-7,6-3,5-7 |
| ITF M15 Monastir | 2021/04/23 15:00 | Omar Giacalone v Laurynas Grigelis | 6-7,6-4,6-2 |
| ITF M15 Monastir | 2021/04/22 11:50 | Arthur Bouquier v Laurynas Grigelis | 1-6,6-7 |
| ITF M15 Monastir | 2021/04/21 12:00 | Louis Tessa v Laurynas Grigelis | 1-6,3-6 |
| ITF M15 Monastir | 2021/04/15 08:25 | Gilbert S K Junior v Laurynas Grigelis | 6-3,6-3 |
| ITF M15 Monastir | 2021/04/14 08:30 | Aziz Ouakaa v Laurynas Grigelis | 4-6,1-6 |
| ITF M15 Monastir | 2020/10/21 10:20 | Laurynas Grigelis v Jean Thirouin | 6-3,2-6,5-7 |
| ITF M15 Monastir | 2020/10/18 08:30 | Laurynas Grigelis v Daniel Michalski | 5-7,7-5,7-6 |