Stadium: Court 7 - Center Round: 25 Ground: Clay
| Challenger - Banja Luka | 2021/09/06 14:30 | Drazen Petrovic v Carlos Gomez-Herrera | 1-6,0-6 |
| ITF - M15 Novi Sad | 2021/08/03 09:40 | Aleksandar Tomas v Drazen Petrovic | 6-7,6-0,10-8 |
| ITF - M15 Novi Sad | 2021/08/02 08:00 | Drazen Petrovic v Darko Jandric | 6-4,6-0 |
| ITF - M15 Novi Sad | 2021/08/01 08:30 | Drazen Petrovic v Milos Vukovic | 6-4,6-2 |
| ITF - M15 Doboj | 2021/07/13 08:00 | Dusan Obradovic v Drazen Petrovic | 6-4,6-4 |
| ITF - M15 Doboj | 2021/07/12 08:00 | Drazen Petrovic v Janos Fekete | 6-4,2-6,13-11 |
| ITF - M25 Velenje | 2021/07/04 07:30 | Drazen Petrovic v Tadija Radovanovic | 4-6,3-6 |
| ITF - M25 Belehrad | 2021/06/27 09:00 | Drazen Petrovic v Stefan Ivic | 6-3,3-6,8-10 |
| ITF - M15 Monastir | 2021/08/09 08:30 | Rimpei Kawakami v Coleman Wong | 3-6,7-6,7-10 |
| ITF - M15 Monastir | 2021/08/05 09:45 | Thomas Fancutt v Rimpei Kawakami | 6-2,6-2 |
| ITF - M15 Monastir | 2021/08/04 17:30 | Matthew Dellavedova v Rimpei Kawakami | 6-0,3-6,3-6 |
| ITF - M15 Monastir | 2021/07/29 08:00 | Rimpei Kawakami v Eliakim Coulibaly | 1-6,3-6 |
| ITF - M15 Monastir | 2021/07/27 14:00 | Marco Brugnerotto v Rimpei Kawakami | 7-6,3-6,2-6 |
| ITF - M15 Monastir | 2021/07/20 08:30 | Rimpei Kawakami v Matias Franco Descotte | 4-6,2-6 |
| ITF - M15 Helsinki | 2021/06/03 09:25 | Jaimee Floyd Angele v Rimpei Kawakami | 7-5,6-2 |
| ITF - M15 Helsinki | 2021/06/02 08:45 | Rimpei Kawakami v Simon Yitbarek | 6-4,6-4 |