Stadium: Center Court Round: 14 Ground: Hardcourt outdoor
| Challenger - Lošinj | 2021/10/18 10:00 | Jonas Forejtek v Victor Vlad Cornea | 6-4,6-4 |
| Challenger - Napoli | 2021/10/04 08:00 | Julian Ocleppo v Victor Vlad Cornea | 6-4,7-5 |
| Challenger - Napoli | 2021/10/03 08:55 | Victor Vlad Cornea v Dragos Nicolae Madaras | 7-5,6-4 |
| Challenger - Sibiu | 2021/09/27 13:30 | Franco Agamenone v Victor Vlad Cornea | 6-1,7-6 |
| Challenger - Istanbul | 2021/09/14 12:40 | Aldin Setkic v Victor Vlad Cornea | 6-4,6-2 |
| ITF - M25 Bacau | 2021/08/18 11:25 | Alexandar Lazarov v Victor Vlad Cornea | 6-4,6-4 |
| ITF - M25 Praha | 2021/05/09 10:00 | Victor Vlad Cornea v Jiri Barnat | 5-7,6-3,9-11 |
| Challenger - Zadar | 2021/03/21 13:35 | Victor Vlad Cornea v Marco Bortolotti | 1-6,3-6 |
| ITF - M15 Heraklion | 2021/11/17 10:50 | Michael Zhu v Petros Tsitsipas | 5-7,7-6,6-2 |
| ITF - M25 Villers Les Nancy | 2021/11/10 12:10 | Petros Tsitsipas v Sebastian Fanselow | 5-7,2-6 |
| ITF - M25 Saint Dizier | 2021/11/03 13:20 | Petros Tsitsipas v Jeremy Jahn | 4-6,7-6,6-7 |
| Challenger - Napoli | 2021/10/05 12:55 | Filippo Baldi v Petros Tsitsipas | 6-4,3-6,6-4 |
| Challenger - Napoli | 2021/10/04 08:00 | Bogdan Ionut Apostol v Petros Tsitsipas | 6-3,6-2 |
| Challenger - Sibiu | 2021/09/28 08:40 | Damir Dzumhur v Petros Tsitsipas | 6-2,6-0 |
| Davis Cup | 2021/09/18 09:00 | Petros Tsitsipas v Ricardas Berankis | 1-6,3-6 |
| Challenger - Cassis | 2021/09/05 12:45 | Ramkumar Ramanathan v Petros Tsitsipas | 6-4,6-4 |