Stadium: Court 1 Round: 29 Ground: Clay
| Challenger Zadar - Herredouble | 2021/03/26 13:45 | Golubev/Nedovyesov v Klein/Molcan | 3-6,4-6 |
| Challenger Zadar - Herredouble | 2021/03/25 11:40 | Moroni/Pellegrino v Klein/Molcan | 3-6,3-6 |
| Challenger Zadar - Herredouble | 2021/03/24 14:40 | Cerretani/Cornea v Klein/Molcan | 7-5,6-7,5-10 |
| Challenger Cherbourg - Herredouble | 2021/02/13 11:30 | Klein/Molcan v Hoang/Olivetti | 1-6,7-5,10-6 |
| Challenger Cherbourg - Herredouble | 2021/02/12 20:05 | Goransson/Pel v Klein/Molcan | 6-7,6-7 |
| Challenger Cherbourg - Herredouble | 2021/02/11 14:45 | Sijsling/Smits v Klein/Molcan | 6-7,6-7 |
| Challenger Cherbourg - Herredouble | 2021/02/10 16:20 | Klein/Molcan v Janvier/Zapata Miralles | 6-0,6-3 |
| Challenger Bratislava - Herredouble | 2020/11/14 15:00 | Heliovaara/Ruusuvuori v Klein/Molcan | 6-4,6-3 |
| Challenger Zadar - Herredouble | 2021/03/26 15:15 | Sabanov/Sabanov v Kavcic/Rola | 5-7,4-6 |
| Challenger Zadar - Herredouble | 2021/03/25 12:50 | Kavcic/Rola v Kekez/Poljicak | 6-4,6-3 |
| Challenger Zadar - Herredouble | 2021/03/24 12:55 | Orlov/Wu v Kavcic/Rola | 3-6,1-6 |