Stadium: Center Court Round: 26 Ground: Clay
| Challenger Braunschweig | 2021/07/05 15:50 | Sumit Nagal v Mohamed Safwat | 6-3,7-6 |
| Challenger Aix en Provence | 2021/06/15 08:30 | Tristan Lamasine v Sumit Nagal | 4-6,7-6,6-1 |
| 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 Braunschweig | 2021/07/06 10:30 | Marvin Moeller v Teymuraz Gabashvili | 7-5,6-3 |
| ITF M25 Vratislav | 2021/06/28 09:30 | Marvin Moeller v Matej Galik | 6-3,6-7,11-13 |
| ITF M25 Vratislav | 2021/06/27 11:00 | Marvin Moeller v Jasza Szajrych | 6-2,6-1 |
| ITF M25 Alkmaar | 2021/06/25 11:30 | Nicolas Alvarez Varona v Marvin Moeller | 6-1,6-4 |
| ITF M25 Alkmaar | 2021/06/24 09:00 | Deney Wassermann v Marvin Moeller | 6-7,7-6,3-6 |
| ITF M25 Alkmaar | 2021/06/23 10:55 | Marvin Moeller v Jeremy Jahn | 6-2,6-0 |
| ITF M25 Alkmaar | 2021/06/21 17:30 | Marvin Moeller v Michiel de Krom | 2-6,6-4,10-3 |
| ITF M25 Alkmaar | 2021/06/20 11:00 | Marvin Moeller v Max Wiskandt | 7-6,6-3 |