Stadium: Centre Court Round: 28 Ground: Clay
| Challenger Ostrava - HD | 2021/04/29 12:00 | Jebavy/Zelenay v Kolar/Rosol | 3-6,1-6 |
| Challenger Ostrava - HD | 2021/04/28 15:20 | Kolar/Rosol v Lehecka/Vrbensky | 6-1,7-6 |
| Challenger - Split - HD | 2021/04/15 13:00 | Kolar/Rosol v Golubev/Nedovyesov | 6-3,3-6,8-10 |
| Challenger - Split - HD | 2021/04/14 14:50 | Kolar/Rosol v Margaroli/Shamasdin | 6-3,6-2 |
| Challenger - Split - HD | 2021/04/09 12:45 | Golubev/Nedovyesov v Kolar/Rosol | 6-2,2-6,10-6 |
| Challenger - Split - HD | 2021/04/08 12:45 | Raja/Weissborn v Kolar/Rosol | 3-6,6-3,8-10 |
| Challenger - Split - HD | 2021/04/07 13:25 | Ajdukovic/Jakic v Kolar/Rosol | 4-6,1-6 |
| Challenger Prostejov - HD | 2020/09/11 12:30 | Balaji/Sharan v Kolar/Rosol | 2-6,6-2,6-10 |
| Challenger Ostrava - HD | 2021/04/29 14:25 | Drzewiecki/Walkow v Polmans/Stakhovsky | 6-7,5-7 |
| Challenger Ostrava - HD | 2021/04/28 12:50 | Miedler/Safwat v Polmans/Stakhovsky | 6-4,6-7,1-10 |