Stadium: Court 9 Round: 27 Ground: Hardcourt indoor
| Challenger Bratislava - MP | 2021/06/09 12:30 | Jaziri/Rola v Schnur/Verbeek | 6-3,7-5 |
| Challenger Bratislava - MP | 2021/06/09 14:00 | Klein/Molcan v Jebavy/Kolar | 7-6,6-4 |
| Challenger Zadar - MP | 2021/03/27 15:15 | Klein/Molcan v Kavcic/Rola | 6-2,2-6,3-10 |
| Challenger Zadar - MP | 2021/03/26 13:45 | Golubev/Nedovyesov v Klein/Molcan | 3-6,4-6 |
| Challenger Zadar - MP | 2021/03/25 11:40 | Moroni/Pellegrino v Klein/Molcan | 3-6,3-6 |
| Challenger Zadar - MP | 2021/03/24 14:40 | Cerretani/Cornea v Klein/Molcan | 7-5,6-7,5-10 |
| Challenger Cherbourg - MP | 2021/02/13 11:30 | Klein/Molcan v Hoang/Olivetti | 1-6,7-5,10-6 |
| Challenger Cherbourg - MP | 2021/02/12 20:05 | Goransson/Pel v Klein/Molcan | 6-7,6-7 |
| Challenger Cherbourg - MP | 2021/02/11 14:45 | Sijsling/Smits v Klein/Molcan | 6-7,6-7 |