| ITF M25 Muttenz | 2021/08/16 07:55 | Mischa Lanz v Nikolaj Katic | 7-5,6-4 |
| ITF M15 Frederiksberg | 2021/08/01 08:00 | Adam Heinonen v Nikolaj Katic | 6-3,6-7,10-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/19 07:00 | Nikolaj Katic v Warren Sinius | 4-5 |
| UTR Pro Tennis Series Copenhagen | 2021/06/18 11:00 | Benjamin Hannestad v Nikolaj Katic | 6-4,6-1 |
| UTR Pro Tennis Series Copenhagen | 2021/06/17 08:00 | Daniel De Jonge v Nikolaj Katic | 4-6,6-4,6-0 |
| ITF Turkey F3 | 2018/01/20 09:00 | Nikolaj Katic v Roberts Grinvalds | 0-6,4-6 |
| ITF Turkey F1 | 2018/01/07 08:30 | Zizou Bergs v Nikolaj Katic | 6-2,6-1 |
| ITF Turkey F1 | 2018/01/06 09:00 | Philipp Sikorski v Nikolaj Katic | 2-6,6-1,2-6 |
| ITF M25 Bagneres-De-Bigorre | 2021/09/01 17:00 | Lucas Catarina v Maxence Broville | 7-5,6-4 |
| ITF M25 Bagneres-De-Bigorre | 2021/08/30 08:00 | Maxence Broville v Maxence Rivet | 6-4,6-4 |
| ITF M15 Pescara | 2021/08/18 11:45 | Maxence Broville v Giorgio Ricca | 4-6,3-6 |
| ITF M15 Pescara | 2021/08/16 13:30 | Maxence Broville v Alessandro Ragazzi | 6-4,4-6,4-10 |
| ITF M15 Pescara | 2021/08/16 07:30 | Maxence Broville v Nicolo Inserra | 6-3,6-2 |
| ITF M15 Pescara | 2021/08/15 11:15 | Maxence Broville v Richard Biagiotti | 6-1,7-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/09 11:00 | Luc Fomba v Maxence Broville | 1-6,2-6 |
| ITF M15 Esch/Alzette | 2021/07/19 10:40 | Maxence Broville v Fons Van Sambeek | 4-6,2-6 |