Stadium: Court 4 Round: 28 Ground: Hardcourt outdoor
| Challenger - Split - Herredouble | 2021/04/10 14:35 | Golubev/Nedovyesov v Walkow/Zielinski | 7-5,6-7,10-5 |
| Challenger - Split - Herredouble | 2021/04/15 12:35 | Ajdukovic/Nincevic v Walkow/Zielinski | 0-6,4-6 |
| Challenger - Split - Herredouble | 2021/04/14 13:00 | Walkow/Zielinski v Raja/Weissborn | 6-3,6-4 |
| Challenger - Split - Herredouble | 2021/04/10 14:35 | Golubev/Nedovyesov v Walkow/Zielinski | 7-5,6-7,10-5 |
| Challenger - Split - Herredouble | 2021/04/09 13:35 | Walkow/Zielinski v Olivetti/Reid | 6-4,6-4 |
| Challenger - Split - Herredouble | 2021/04/08 11:00 | Walkow/Zielinski v Galloway/Lawson | 7-5,7-6 |
| Challenger - Split - Herredouble | 2021/04/07 12:40 | Doumbia/Reboul v Walkow/Zielinski | 3-6,2-6 |
| Challenger - Lugano - Herredouble | 2021/03/26 16:05 | Molchanov/Stakhovsky v Walkow/Zielinski | 4-6,7-6,10-4 |
| Challenger - Lugano - Herredouble | 2021/03/25 14:20 | Walkow/Zielinski v Raja/Weissborn | 6-4,6-2 |
| Challenger - Split - Herredouble | 2021/04/15 13:00 | Kolar/Rosol v Golubev/Nedovyesov | 6-3,3-6,8-10 |
| Challenger - Split - Herredouble | 2021/04/14 13:00 | Gojo/Serdarusic v Golubev/Nedovyesov | 7-6,6-7,7-10 |
| Challenger - Split - Herredouble | 2021/04/10 14:35 | Golubev/Nedovyesov v Walkow/Zielinski | 7-5,6-7,10-5 |
| Challenger - Split - Herredouble | 2021/04/09 12:45 | Golubev/Nedovyesov v Kolar/Rosol | 6-2,2-6,10-6 |
| Challenger - Split - Herredouble | 2021/04/08 11:00 | Golubev/Nedovyesov v Brown/Margaroli | 6-2,6-1 |
| Challenger - Split - Herredouble | 2021/04/07 11:05 | Golubev/Nedovyesov v Krolo/Mikrut | 6-1,6-3 |
| Challenger - Zadar - Herredouble | 2021/03/26 13:45 | Golubev/Nedovyesov v Klein/Molcan | 3-6,4-6 |
| Challenger - Zadar - Herredouble | 2021/03/25 11:55 | Golubev/Nedovyesov v Brkic/Serdarusic | 1-6,6-2,12-10 |