Stadium: Court 11 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Sintra | 2023/09/10 16:30 | Nikolai Marin v Aditya Katticaren | 6-1,6-0 |
| UK Pro League | 2023/06/02 10:30 | Alexis Canter v Nikolai Marin | 6-0,6-2 |
| UK Pro League | 2023/06/01 11:30 | Robert Cowley v Nikolai Marin | 6-3,6-2 |
| UK Pro League | 2023/05/31 13:00 | Oscar Wai v Nikolai Marin | 6-3,6-4 |
| UK Pro League | 2023/05/30 12:00 | Nikolai Marin v Ryan James Storrie | 0-6,1-6 |
| UK Pro League | 2023/05/29 12:00 | Nikolai Marin v Tiran Sanghera | 1-6,1-6 |
| ITF M25 Bath | 2023/02/05 09:55 | Nikolai Marin v Matthew Rankin | 2-6,7-6,7-10 |
| ITF M25 Sintra | 2022/09/13 12:00 | Nikolai Marin v Ian Luca Cervantes Tomas | 3-6,2-6 |
| ITF M25 Sintra | 2023/09/10 16:30 | Josh Reid v Stefan Cooper | 4-6,2-6 |
| ITF M25 Nottingham | 2023/07/09 12:10 | Stefan Cooper v George Houghton | 6-7,4-6 |
| UTR Pro London | 2023/05/21 08:00 | Richard Bloomfield v Stefan Cooper | 6-7,3-6 |
| UTR Pro London | 2023/05/20 11:40 | Stefan Cooper v Yujiro Onuma | 1-0 |
| UTR Pro London | 2023/05/19 10:40 | Luke Simkiss v Stefan Cooper | 6-7,4-6 |
| UTR Pro London | 2023/05/18 07:00 | Victor Sklenka v Stefan Cooper | 3-6,6-1,5-6 |
| UTR Pro London | 2023/05/16 07:00 | Franco Capalbo v Stefan Cooper | 4-6,6-1,6-4 |
| UTR Pro London | 2023/05/15 10:00 | Stefan Cooper v Ivan Denisov | 2-6,4-6 |