| TennisDirect NK Tennis | 2021/12/15 10:30 | Tim Van Rijthoven v Amadatus Admiraal | 6-2,6-0 |
| UTR Pro Tennis Series Amsterdam | 2021/12/11 11:30 | Amadatus Admiraal v Michiel de Krom | 3-6,4-5 |
| UTR Pro Tennis Series Amsterdam | 2021/12/09 07:00 | Amadatus Admiraal v Aloys J W Van Baal | 6-4,6-6 |
| UTR Pro Tennis Series Amsterdam | 2021/12/08 09:30 | Amadatus Admiraal v Denys Puzanof | 6-0,5-0 |
| UTR Pro Tennis Series Amsterdam | 2021/11/07 12:00 | Max Houkes v Amadatus Admiraal | 6-0,6-4 |
| UTR Pro Tennis Series Amsterdam | 2021/11/06 10:30 | Amadatus Admiraal v Rik Muller | 7-6,5-2 |
| UTR Pro Tennis Series Amsterdam | 2021/11/05 13:30 | Amadatus Admiraal v Benjamin Dhoe | 3-6,3-5 |
| UTR Pro Tennis Series Amsterdam | 2021/11/04 13:30 | Amadatus Admiraal v Mikhail Minakov | 3-6,4-5 |
| UTR Pro Tennis Series Amsterdam | 2021/12/08 08:30 | Roland Stuurman v Jesse De Jager | 6-4,0-0 |
| UTR Pro Tennis Series Amsterdam | 2021/12/06 08:30 | Max Houkes v Jesse De Jager | 4-6,6-2,6-3 |
| ITF M15 Sharm El Sheikh | 2021/10/31 08:00 | Sebastian Sorger v Jesse De Jager | 6-4,3-6,11-9 |
| ITF M15 Sharm El Sheikh | 2021/10/24 12:00 | Jesse De Jager v Emiliano Maggioli | 3-6,5-7 |
| ITF M25 Ricany | 2021/08/29 09:00 | Jesse De Jager v Noel Larwig | 3-6,6-3,4-10 |
| ITF M25 Poznan | 2021/08/24 08:00 | Harry Wendelken v Jesse De Jager | 6-1,6-3 |
| ITF M25 Poznan | 2021/08/22 08:00 | Jesse De Jager v Ioannis Stamoulos | 6-3,6-0 |
| ITF M15 Lodz | 2021/08/16 09:30 | Alan Bojarski v Jesse De Jager | 7-5,7-5 |