Stadium: Court 17 Round: 27 Ground: Clay
| Challenger Taipei - Doubles Hommes | 2018/04/11 12:25 | Bury A / Peng H-Y v Jung J / Soeda G | 6-2,6-3 |
| Challenger Zagreb - Doubles Hommes | 2021/05/12 08:00 | Walkow S / Zielinski J v Golubev/Tiurnev | 6-0,6-2 |
| Challenger - Prague - Doubles Hommes | 2021/05/04 15:40 | Walkow S / Zielinski J v Sabanov/Sabanov | 6-3,3-6,5-10 |
| Challenger Split - Doubles Hommes | 2021/04/17 13:00 | Barrere G / Olivetti A v Walkow S / Zielinski J | 2-6,5-7 |
| Challenger Split - Doubles Hommes | 2021/04/16 13:30 | Walkow S / Zielinski J v Golubev A / Nedovyesov A | 6-3,7-6 |
| Challenger Split - Doubles Hommes | 2021/04/15 12:35 | Ajdukovic/Nincevic v Walkow S / Zielinski J | 0-6,4-6 |
| Challenger Split - Doubles Hommes | 2021/04/14 13:00 | Walkow S / Zielinski J v Raja/Weissborn | 6-3,6-4 |
| Challenger Split - Doubles Hommes | 2021/04/10 14:35 | Golubev A / Nedovyesov A v Walkow S / Zielinski J | 7-5,6-7,10-5 |
| Challenger Split - Doubles Hommes | 2021/04/09 13:35 | Walkow S / Zielinski J v Olivetti/Reid | 6-4,6-4 |