Stadium: Court 1 Round: 25 Ground: Clay
| Challenger Almaty | 2021/06/09 05:40 | Evan Furness v Pedja Krstin | 6-3,6-1 |
| Challenger Almaty | 2021/06/07 11:30 | Pedja Krstin v Mohamed Safwat | 6-4,6-0 |
| ATP Belgrade | 2021/05/25 13:55 | Alex Molcan v Pedja Krstin | 6-0,6-0 |
| ATP Belgrade | 2021/05/23 10:30 | Pedja Krstin v Soonwoo Kwon | 6-2,3-6,6-1 |
| ITF M15 Prijedor | 2021/05/11 15:05 | Pedja Krstin v Mateja Janicijevic | 6-1,6-0 |
| Challenger Rome Qual | 2021/04/25 09:15 | Matteo Gigante v Pedja Krstin | 4-6,7-5,6-4 |
| Challenger Belgrade | 2021/04/12 16:00 | Damir Dzumhur v Pedja Krstin | 4-6,6-2,6-3 |
| Challenger St. Petersburg | 2021/03/10 08:30 | Zizou Bergs v Pedja Krstin | 6-2,6-1 |
| Challenger Almaty | 2021/06/08 10:20 | Teymuraz Gabashvili v Filip Cristian Jianu | 1-6,3-6 |
| ATP Parma | 2021/05/23 10:00 | Raul Brancaccio v Teymuraz Gabashvili | 6-3,6-3 |
| ATP Parma | 2021/05/22 13:25 | Teymuraz Gabashvili v Philipp Kohlschreiber | 1-6,7-5,6-2 |
| Challenger Biella | 2021/05/16 12:10 | Teymuraz Gabashvili v Viktor Galovic | 1-6,4-6 |
| Challenger Biella | 2021/05/02 11:00 | Teymuraz Gabashvili v Tomas Barrios Vera | 3-6,2-6 |
| Challenger Ostrava | 2021/04/25 11:15 | Teymuraz Gabashvili v Vitaliy Sachko | 6-4,2-6,6-7 |
| Challenger Rome | 2021/04/18 08:00 | Alex Molcan v Teymuraz Gabashvili | 7-6,6-1 |
| ATP Cagliari | 2021/04/04 12:35 | Teymuraz Gabashvili v Marc-Andrea Huesler | 4-6,4-6 |