Stadium: Campo Fabrizio Gasparini Round: 26 Ground: Clay
| Challenger Liberec MD | 2021/08/05 11:35 | Polmans/Reid v Griekspoor/Stevens | 7-5,6-7,10-6 |
| Challenger Liberec MD | 2021/08/03 13:35 | Forejtek/Vrbensky v Griekspoor/Stevens | 3-6,6-4,7-10 |
| ATP Umag MD | 2021/07/21 19:40 | Brkic/Cacic v Ajdukovic/Nincevic | 6-4,3-6,10-8 |
| Challenger Zagreb MD | 2021/05/14 09:30 | Ajdukovic/Nincevic v Arneodo/Olivetti | 5-7,4-6 |
| Challenger Zagreb MD | 2021/05/11 16:00 | Ajdukovic/Nincevic v Coria/Gomez | 6-3,7-6 |
| Challenger Split MD | 2021/04/15 12:35 | Ajdukovic/Nincevic v Walkow/Zielinski | 0-6,4-6 |
| Challenger Split MD | 2021/04/14 15:40 | Drzewiecki/Masur v Ajdukovic/Nincevic | 2-6,6-7 |