Stadion: Grass 7 Round: 26 Ground: Hardcourt outdoor
| ITF - M25 - Roehampton | 2023/07/18 14:20 | Johannus Monday v Finn Murgett | 6-2,6-3 |
| Wimbledon | 2023/06/28 10:00 | Radu Albot v Johannus Monday | 3-6,7-6,6-2 |
| Wimbledon | 2023/06/26 10:00 | Mili Poljicak v Johannus Monday | 6-3,6-7,3-6 |
| Challenger - Ilkley | 2023/06/19 17:10 | Raul Brancaccio v Johannus Monday | 6-3,6-3 |
| Challenger - Nottingham | 2023/06/11 12:45 | Johannus Monday v Zachary Svajda | 2-6,2-6 |
| Challenger - Surbiton | 2023/06/04 15:00 | Johannus Monday v James McCabe | 6-7,6-7 |
| UK - Pro League | 2023/06/02 12:00 | Johannus Monday v David Quayle | 6-2,6-2 |
| UK - Pro League | 2023/06/01 14:30 | Johannus Monday v Marcus Walters | 6-4,6-3 |
| ITF - M25 - Roehampton | 2023/07/18 12:05 | Devin Badenhorst v Freddy Blaydes | 6-4,3-6,6-3 |
| ITF - M25 - Nottingham | 2023/07/12 10:15 | Billy Harris v Devin Badenhorst | 7-6,6-2 |
| ITF - M25 - Sharm El Sheikh | 2023/04/20 11:10 | Alex Knaff v Devin Badenhorst | 6-4,6-2 |
| ITF - M25 - Sharm El Sheikh | 2023/04/19 13:35 | Devin Badenhorst v Alibek Kachmazov | 7-6,4-6,7-6 |
| ITF - M25 - Sharm El Sheikh | 2023/04/12 13:30 | Ilia Simakin v Devin Badenhorst | 7-6,7-6 |
| ITF - M15 - Sharm El Sheikh | 2023/04/05 13:45 | Peter Fajta v Devin Badenhorst | 6-0,7-6 |
| ITF - M15 - Monastir | 2023/03/01 11:25 | Devin Badenhorst v Adrien Gobat | 4-6,3-6 |
| ITF - M25 - Monastir | 2023/02/22 09:00 | Devin Badenhorst v Jie Cui | 2-6,3-6 |