Stadium: Court 4 Round: 25 Ground: Clay
| ITF M25 The Hague | 2023/07/03 10:00 | Roland Stuurman v Collin Altamirano | 2-6,6-3,10-8 |
| ITF M25 The Hague | 2023/07/02 08:00 | Twan Van Zijl v Collin Altamirano | 1-6,5-7 |
| ITF M15 Wroclaw | 2023/06/26 08:00 | Collin Altamirano v Michael Agwi | 3-6,3-6 |
| ITF M15 Wroclaw | 2023/06/25 09:00 | Kris Krawcewicz v Collin Altamirano | 3-6,0-6 |
| Saarlouis, Singles Qualifying M-ITF-GER-07A | 2023/06/22 10:15 | Joao Fonseca v Collin Altamirano | 6-2,6-3 |
| Saarlouis, Singles Qualifying M-ITF-GER-07A | 2023/06/21 09:20 | Collin Altamirano v Andres Andrade | 7-6,2-6,6-3 |
| Saarlouis, Singles Qualifying M-ITF-GER-07A | 2023/06/19 09:30 | Boris Fassbender v Collin Altamirano | 2-6,7-6,8-10 |
| Saarlouis, Singles Qualifying M-ITF-GER-07A | 2023/06/18 09:00 | Sudzum, Marcel Marlon v Collin Altamirano | 1-6,2-6 |
| ITF M25 The Hague | 2023/07/03 13:55 | Oskar Jansson v David Quayle | 6-1,6-2 |
| ITF M25 The Hague | 2023/07/02 10:30 | Oskar Jansson v Miko Wassermann | 7-6,6-1 |
| ITF - M15 Kalmar | 2023/05/19 10:25 | Oskar Jansson v Lucas Catarina | 6-7,6-7 |
| ITF - M15 Kalmar | 2023/05/18 09:00 | Oskar Jansson v Erik Grevelius | 6-4,4-6,6-4 |
| ITF - M15 Kalmar | 2023/05/17 12:30 | Lucas Renard v Oskar Jansson | 6-4,3-6,2-6 |
| ITF - M15 Kalmar | 2023/05/16 10:10 | Mika Lipp v Oskar Jansson | 4-6,4-6 |
| ITF - M15 Kalmar | 2023/05/15 12:00 | Oskar Jansson v Fabian Hansch Mauritzson | 6-3,6-2 |
| ITF - M25 Varnamo | 2023/05/09 11:55 | Oskar Jansson v Tibo Colson | 0-6,4-6 |