Stadium: Court 6 Round: 26 Ground: Hardcourt outdoor
| ITF - Doha M15 | 2023/01/11 12:00 | Samir Hamza Reguig v Guy Den Heijer | 3-6,1-6 |
| ITF - Doha M15 | 2023/01/10 12:00 | Guy Den Heijer v Arslanbek Aitkulov | 6-2,7-5 |
| ITF - Oldenzaal M25 | 2022/08/25 16:55 | Max Houkes v Guy Den Heijer | 6-1,6-3 |
| ITF - Oldenzaal M25 | 2022/08/24 11:50 | Thijmen Loof v Guy Den Heijer | 3-6,5-7 |
| ITF - Alkmaar M15 | 2022/06/21 18:00 | Guy Den Heijer v Jose Fco. Vidal Azorin | 2-6,2-6 |
| UTR Pro Tennis Series - Blaricum | 2022/05/08 07:30 | Guy Den Heijer v Jarno Jans | 6-4,6-3 |
| UTR Pro Tennis Series - Blaricum | 2022/05/07 07:30 | Guy Den Heijer v Ivan Marrero Curbelo | 7-5,5-3 |
| UTR Pro Tennis Series - Blaricum | 2022/05/06 11:00 | Alen Moritz Hodzic v Guy Den Heijer | 3-6,5-6 |
| ITF - Doha M15 | 2023/01/11 12:00 | Kristjan Tamm v Jaimee Floyd Angele | 6-3,6-2 |
| ITF - Monastir M15 | 2023/01/04 09:00 | Kristjan Tamm v Guy Den Ouden | 2-6,4-6 |
| ITF - Monastir M15 | 2022/12/30 09:30 | Robin Bertrand v Kristjan Tamm | 6-4,6-0 |
| ITF - Monastir M15 | 2022/12/29 14:00 | Kristjan Tamm v Ryuki Matsuda | 3-6,6-2,6-2 |
| ITF - Monastir M15 | 2022/12/28 13:00 | Matas Vasiliauskas v Kristjan Tamm | 3-6,1-6 |
| ITF - Monastir M15 | 2022/12/21 08:30 | Kristjan Tamm v Florent Bax | 2-6,3-6 |
| ITF - Al Zahra M15 | 2022/11/06 14:30 | Yanki Erel v Kristjan Tamm | 6-3,1-6,6-3 |
| ITF - Al Zahra M15 | 2022/11/05 07:00 | Kristjan Tamm v William Jansen | 6-2,6-4 |