Stadium: Court 1 Round: 28 Ground: Hardcourt indoor
| ATP Metz MD | 2021/09/23 10:00 | Sabanov/Sabanov v Nys/Rinderknech | 3-6,4-6 |
| ATP Metz MD | 2021/09/20 13:50 | Nys/Rinderknech v Saville/Smith | 6-3,7-5 |
| Challenger Rennes MD | 2021/09/15 09:50 | Stevens/Van Rijthoven v Nys/Rinderknech | 1-6,7-5,10-8 |
| US Open MD | 2021/09/04 18:30 | Nys/Rinderknech v Bopanna/Dodig | 3-6,6-4,4-6 |
| ATP Metz MD | 2021/09/23 14:10 | Reese/Verbeek v Brkic/Cacic | 3-6,3-6 |
| ATP Metz MD | 2021/09/22 10:00 | Giron/Olivetti v Brkic/Cacic | 4-6,7-6,1-10 |
| US Open MD | 2021/09/04 19:20 | Golubev/Mies v Brkic/Cacic | 7-5,6-2 |
| US Open MD | 2021/09/02 20:45 | Cuevas/Mannarino v Brkic/Cacic | 7-6,2-6,4-6 |
| ATP Winston-Salem MD | 2021/08/23 18:00 | Brkic/Cacic v Mahut/Martin | 4-6,1-6 |
| 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 |