Stadium: Center Court Round: 29 Ground: Clay
| Challenger - Prague - Doubles Hommes | 2021/05/04 15:40 | Walkow S / Zielinski J v Sabanov/Sabanov | 6-3,3-6,5-10 |
| Challenger Braunschweig MD | 2021/07/09 10:00 | Sabanov/Sabanov v Sijsling / Smits | 6-1,6-2 |
| Challenger Braunschweig MD | 2021/07/07 15:50 | Sabanov/Sabanov v Gengel M / Langmajer D | 6-1,4-6,10-3 |
| Challenger Bratislava MD | 2021/06/10 09:00 | Luz O / Matos R v Sabanov/Sabanov | 6-2,6-3 |
| Challenger Bratislava MD | 2021/06/09 08:30 | Palovic/Pokorny v Sabanov/Sabanov | 2-6,5-7 |
| ATP Belgrade MD | 2021/05/27 12:55 | Sabanov/Sabanov v Erlich J / Vasilevski A | 3-6,6-3,11-13 |
| ATP Belgrade MD | 2021/05/26 15:50 | Delbonis/Sitak v Sabanov/Sabanov | 2-6,1-6 |
| ATP Belgrade MD | 2021/05/23 15:20 | Sabanov/Sabanov v Brkic T / Cacic N | 4-6,6-3,10-8 |
| Challenger Heilbronn MD | 2021/05/12 13:30 | Matos R / Meligeni Rodrigues Alves F v Sabanov/Sabanov | 6-3,6-0 |
| Challenger Braunschweig MD | 2021/07/08 14:50 | Duran/Sandkaulen v Walkow S / Zielinski J | 5-7,4-6 |
| Challenger Braunschweig MD | 2021/07/07 11:35 | Walkow S / Zielinski J v Cerretani/Zelenay | 6-3,6-4 |
| Challenger Milan MD | 2021/06/25 16:25 | Brown/Weissborn v Walkow S / Zielinski J | 7-5,6-4 |
| Challenger Milan MD | 2021/06/24 13:00 | Bonadio/Gabashvili v Walkow S / Zielinski J | 2-6,1-6 |
| Challenger Milan MD | 2021/06/23 15:00 | Brancaccio R / Zeppieri G v Walkow S / Zielinski J | 6-7,4-6 |
| Challenger - Aix en Provence - Doubles Hommes | 2021/06/18 15:40 | Walkow S / Zielinski J v Doumbia/Reboul | 6-7,4-6 |
| Challenger - Aix en Provence - Doubles Hommes | 2021/06/17 09:00 | Walkow S / Zielinski J v Lamasine T / Olivetti A | 6-4,7-5 |
| Challenger - Aix en Provence - Doubles Hommes | 2021/06/16 11:20 | Matos/Molchanov v Walkow S / Zielinski J | 0-6,7-6,8-10 |