| ITF M15 Cancun | 03/19 19:00 | 25 | Gerritsen, Stephan v Facundo Mena | 3-6,4-6 | |
| ITF M15 Cancun | 03/12 16:20 | 25 | Schmid, Aaron v Gerritsen, Stephan | 4-6,7-6,6-4 | |
| ITF Tunisia F42 | 11/30 08:30 | 27 | Johnson, Luke v Gerritsen, Stephan | Retired | |
| ITF Tunisia F42 | 11/29 09:00 | 26 | Davydov, Ivan v Gerritsen, Stephan | 7-5,6-7,1-6 | |
| ITF Tunisia F42 | 11/27 08:00 | 25 | Eminefendic, Ervin Haris v Gerritsen, Stephan | 1-6,2-6 | |
| ITF Tunisia F41 | 11/23 08:30 | 27 | Gerritsen, Stephan v Moez Echargui | 4-6,2-6 | |
| ITF Tunisia F41 | 11/22 08:00 | 26 | Franco Emanuel Egea v Gerritsen, Stephan | 6-1,4-6,5-7 | |
| ITF Tunisia F41 | 11/21 08:00 | 25 | Gerritsen, Stephan v Alec Deckers | 6-4,6-7,7-5 | |
| ITF USA F28B | 10/25 19:30 | 26 | Gerritsen, Stephan v Matias Soto | 4-6,2-6 | |
| ITF USA F28B | 10/22 20:25 | 25 | Thomas, Danny v Gerritsen, Stephan | 6-3,3-6,1-6 | |
| ITF USA F28 | 10/16 15:00 | 25 | Axel Nefve v Gerritsen, Stephan | 6-3,6-2 | |
| ITF USA F27 | 10/11 15:00 | 26 | Schneider, Ronnie v Gerritsen, Stephan | 6-4,6-1 | |
| ITF USA F27 | 10/10 16:30 | 25 | El Midhawy, Adam v Gerritsen, Stephan | 3-6,2-6 | |
| ITF Kazakhstan F8 | 09/25 05:00 | 25 | Gerritsen, Stephan v Ayap, Sagadat | 2-6,3-6 | |
| ITF Kazakhstan F7 | 09/18 05:25 | 25 | Gerritsen, Stephan v Mikalai Haliak | 3-6,6-4,4-6 | |
| ITF Netherlands F6 | 08/31 10:50 | 27 | Gerritsen, Stephan v van Beem, Colin | 6-7,3-6 | |
| ITF Netherlands F6 | 08/30 14:35 | 26 | Gerritsen, Stephan v Alec Deckers | 6-2,6-3 | |
| ITF Netherlands F6 | 08/29 08:00 | 25 | Gerritsen, Stephan v Borg, Maikel | 3-6,6-3,7-6 | |
| ITF Netherlands F5 | 08/21 12:20 | 25 | Kaczynski, Kevin v Gerritsen, Stephan | 6-4,1-6,6-2 | |
| ITF Netherlands F4 | 08/14 11:25 | 25 | Gerritsen, Stephan v Michiel de Krom | 4-6,2-6 | |
| ITF Belgium F7 | 08/07 12:30 | 25 | Vanneste, Jeroen v Gerritsen, Stephan | 6-3,6-4 | |
| ITF Belgium F6 | 08/01 11:00 | 25 | Gerritsen, Stephan v Sinclair, Colin | Retired | |
| ITF Belgium F5 | 07/26 09:00 | 27 | Merckx, Jonas v Gerritsen, Stephan | 6-2,6-0 | |
| ITF Belgium F5 | 07/25 15:30 | 26 | Watson, Andrew v Gerritsen, Stephan | 3-6,6-7 | |
| ITF Belgium F5 | 07/23 10:00 | 25 | Buvaysar Gadamauri v Gerritsen, Stephan | 2-6,3-6 | |
| ITF Belgium F4 | 07/19 09:00 | 27 | Merckx, Jonas v Gerritsen, Stephan | 6-3,6-1 | |
| ITF Belgium F4 | 07/18 10:05 | 26 | Simon Beaupain v Gerritsen, Stephan | 5-7,6-4,2-6 | |
| ITF Belgium F4 | 07/17 12:00 | 25 | Irigaray Guarne, Pablo v Gerritsen, Stephan | 3-6,0-6 | |
| ITF Netherlands F3 | 07/11 17:00 | 26 | Gerritsen, Stephan v Emil Ruusuvuori | 6-7,4-6 | |
| ITF Netherlands F3 | 07/10 13:55 | 25 | Gerritsen, Stephan v Kaczynski, Kevin | 7-6,2-6,6-1 |