Stadium: Court 8 Round: 54 Ground: Clay
| ITF M15 Eindhoven | 2023/07/31 08:00 | Guy Den Heijer v Daniel De Jonge | 6-7,7-5,11-13 |
| ITF M25 Esch/Alzette | 2023/07/20 09:30 | Guy Den Heijer v David Pichler | 7-5,3-6,5-7 |
| ITF M25 Esch/Alzette | 2023/07/19 12:05 | Guy Den Heijer v Jan Sebesta | 6-7,7-6,6-3 |
| ITF M25 Esch/Alzette | 2023/07/17 15:20 | Guy Den Heijer v William Jucha | 6-4,7-5 |
| ITF M25 Esch/Alzette | 2023/07/17 08:40 | Guy Den Heijer v Mats Bredschneijder | 4-6,6-2,10-6 |
| ITF M25 Esch/Alzette | 2023/07/10 09:30 | Brian Bozemoj v Guy Den Heijer | 6-2,4-6,16-14 |
| ITF M25 The Hague | 2023/07/07 11:35 | Eric Vanshelboim v Guy Den Heijer | 6-2,6-2 |
| ITF M25 The Hague | 2023/07/06 09:00 | Fons Van Sambeek v Guy Den Heijer | 4-6,6-1,2-6 |
| ITF M25 Aldershot | 2023/08/14 12:50 | Toby Martin v Damien Salvestre | 2-6,6-7 |
| ITF M25 Aldershot | 2023/08/13 10:20 | Toby Martin v Luca Pow | 6-3,6-0 |
| ITF M25 Roehampton | 2023/08/07 09:00 | Ewan Moore v Toby Martin | 4-6,6-4,10-7 |
| ITF M25 Roehampton | 2023/08/06 09:00 | Nicholas Jovanovski v Toby Martin | 4-6,3-6 |
| ITF M25 Roehampton | 2023/07/17 12:30 | Finn Murgett v Toby Martin | 6-3,6-4 |
| ITF M25 Roehampton | 2023/07/16 15:55 | Phoenix Weir v Toby Martin | 4-6,6-3,5-10 |
| ITF M25 Nottingham | 2023/07/10 12:00 | Toby Martin v Alexis Canter | 7-6,2-6,2-10 |
| ITF M25 Nottingham | 2023/07/09 14:45 | Toby Martin v Ying Hou | 6-1,6-1 |