Stadium: Court 5 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Edgbaston | 2023/10/15 12:45 | Tiran Sanghera v Nikolai Marin | 6-1,6-1 |
| ITF M25 Sintra | 2023/09/11 09:00 | Nikolai Marin v Stefan Cooper | 3-6,1-6 |
| 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 Vale Do Lobo | 2023/11/13 11:00 | Peter Buldorini v Diogo Marques | 7-5,6-4 |
| ITF M25 Tavira | 2023/10/18 15:20 | Diogo Marques v Pedro Araujo | 6-4,5-7,0-6 |
| ITF M25 Tavira | 2023/10/17 11:30 | Johannes Ingildsen v Diogo Marques | 6-3,4-6,3-10 |
| ITF M25 Tavira | 2023/10/16 08:30 | Diogo Marques v Manuel Almeida | 6-2,6-2 |
| ITF M25 Tavira | 2023/10/15 09:00 | Oscar Lacides v Diogo Marques | 3-6,5-7 |
| ITF M25 Tavira | 2023/10/11 08:30 | Simon Freund v Diogo Marques | 6-3,7-6 |
| ITF M25 Tavira | 2023/10/10 08:30 | Diogo Marques v Tomas Vaise | 6-2,7-6 |
| ITF M25 Tavira | 2023/10/09 09:00 | Eero Vasa v Diogo Marques | 6-7,4-6 |