Stadion: Court Nissan Round: 25 Ground: Clay
| Challenger - Drummondville | 2019/03/12 18:10 | Tristan Lamasine v Sumit Nagal | 6-2,6-3 |
| Challenger - Lyon | 2021/06/10 09:30 | Facundo Bagnis v Tristan Lamasine | 6-4,6-0 |
| Challenger - Lyon | 2021/06/08 13:45 | Marco Trungelliti v Tristan Lamasine | 6-7,2-6 |
| French Open | 2021/05/24 18:25 | Jozef Kovalik v Tristan Lamasine | 7-5,7-6 |
| Challenger - Biella | 2021/05/17 10:10 | Tristan Lamasine v Dimitar Kuzmanov | 5-7,6-4,1-6 |
| Challenger - Rom | 2021/04/27 08:00 | Juan Manuel Cerundolo v Tristan Lamasine | 7-5,7-5 |
| Challenger - Rom | 2021/04/26 09:30 | Tristan Lamasine v Riccardo Bonadio | 6-4,6-1 |
| Challenger - Rom - Qualifikation | 2021/04/25 08:00 | Tristan Lamasine v Tomas Lipovsek Puches | 6-2,6-3 |
| Challenger - Rom | 2021/04/23 09:00 | Tristan Lamasine v Hugo Gaston | 2-6,6-7 |
| Challenger - Lyon | 2021/06/08 12:05 | Sumit Nagal v Fernando Verdasco | 7-6,6-7,5-7 |
| French Open | 2021/05/26 17:15 | Alejandro Tabilo v Sumit Nagal | 6-3,6-3 |
| French Open | 2021/05/25 17:30 | Roberto Marcora v Sumit Nagal | 3-6,3-6 |
| Challenger - Heilbronn | 2021/05/13 10:00 | Bernabe Zapata Miralles v Sumit Nagal | 6-3,6-1 |
| Challenger - Heilbronn | 2021/05/12 08:30 | Antoine Hoang v Sumit Nagal | 6-1,1-6,4-6 |
| Challenger - Heilbronn | 2021/05/10 13:20 | Sumit Nagal v Denis Kudla | 7-5,1-6,6-1 |
| Challenger - Prag | 2021/05/07 13:00 | Norbert Gombos v Sumit Nagal | 6-4,6-2 |
| Challenger - Prag | 2021/05/06 10:00 | Sergiy Stakhovsky v Sumit Nagal | 6-4,1-6,4-6 |