Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| ATP Kitzbuhel MD | 2021/07/30 08:30 | Brkic/Cacic v Erler/Miedler | 6-1,1-6,10-12 |
| ATP Kitzbuhel MD | 2021/07/28 13:05 | Brkic/Cacic v Matos/Vasilevski | 7-6,2-6,10-8 |
| ATP Kitzbuhel MD | 2021/07/27 13:15 | Brkic/Cacic v Pel/Rinderknech | 6-2,6-3 |
| ATP Umag MD | 2021/07/24 21:50 | Brkic/Cacic v Romboli/Vega Hernandez | 3-6,5-7 |
| ATP Umag MD | 2021/07/23 18:50 | Brkic/Cacic v Sabanov/Sabanov | 6-1,6-2 |
| ATP Umag MD | 2021/07/22 18:45 | Brkic/Cacic v Jebavy/Vesely | 6-2,6-2 |
| ATP Umag MD | 2021/07/21 19:40 | Brkic/Cacic v Ajdukovic/Nincevic | 6-4,3-6,10-8 |
| ATP Hamburg MD | 2021/07/14 10:30 | Golubev/Nedovyesov v Brkic/Cacic | 6-3,7-6 |
| ATP Hamburg MD | 2020/09/24 11:50 | Rojer/Tecau v Mahut/Martin | 6-3,7-5 |
| ATP Hamburg MD | 2020/09/23 08:30 | Nielsen/Puetz v Mahut/Martin | 5-7,5-7 |