Stadium: Court 2 Round: 27 Ground: Clay
| ATP Belgrade MD | 2021/04/22 10:00 | Brkic/Cacic v Bolelli/Gonzalez | 0-6,7-6,10-8 |
| ATP Santiago MD | 2021/03/10 20:00 | Bolelli/Gonzalez v Brkic/Cacic | 7-6,6-3 |
| ATP Geneva MD | 2021/05/19 10:30 | Marach/Pavic v Brkic/Cacic | 6-7,2-6 |
| ATP Munich MD | 2021/04/28 10:20 | Brkic/Cacic v Ebden/Smith | 6-7,6-7 |
| ATP Belgrade MD | 2021/04/23 11:00 | Behar/Escobar v Brkic/Cacic | 6-3,6-4 |
| ATP Belgrade MD | 2021/04/22 10:00 | Brkic/Cacic v Bolelli/Gonzalez | 0-6,7-6,10-8 |
| ATP Belgrade MD | 2021/04/21 11:00 | Arevalo/Middelkoop v Brkic/Cacic | 4-6,6-7 |
| Challenger Belgrade MD | 2021/04/17 12:10 | Duran/Molteni v Brkic/Cacic | 6-4,6-4 |
| Challenger Belgrade MD | 2021/04/16 17:15 | Brkic/Cacic v Bagnis/Cerundolo | 6-0,7-6 |
| Challenger Belgrade MD | 2021/04/15 17:00 | Jebavy/Zelenay v Brkic/Cacic | 6-7,3-6 |
| ATP Geneva MD | 2021/05/17 10:15 | Purcell/Saville v Bolelli/Gonzalez | 6-7,6-7 |
| ATP Estoril MD | 2021/04/28 11:00 | Bolelli/Gonzalez v Klaasen/Mclachlan | 2-6,3-6 |
| ATP Belgrade MD | 2021/04/22 10:00 | Brkic/Cacic v Bolelli/Gonzalez | 0-6,7-6,10-8 |
| ATP Belgrade MD | 2021/04/21 14:45 | Kecmanovic/Lajovic v Bolelli/Gonzalez | 4-6,4-6 |
| ATP Santiago MD | 2021/03/14 16:45 | Bolelli/Gonzalez v Delbonis/Munar | 7-6,6-4 |
| ATP Santiago MD | 2021/03/12 15:00 | Klaasen/Mclachlan v Bolelli/Gonzalez | 4-6,4-6 |
| ATP Santiago MD | 2021/03/11 18:40 | Bolelli/Gonzalez v Arneodo/Paire | 6-2,7-6 |
| ATP Santiago MD | 2021/03/10 20:00 | Bolelli/Gonzalez v Brkic/Cacic | 7-6,6-3 |