Stadium: Court 16 Round: 54 Ground: Hardcourt outdoor
| ITF M15 San Diego | 2024/06/03 16:00 | Benjamin Thomas George v Stian Klaassen | 0-6,0-6 |
| ITF M15 San Diego | 2024/05/27 16:00 | Robin Catry v Stian Klaassen | 6-3,6-4 |
| ITF M15 Eindhoven | 2023/08/02 11:00 | Elmer Moller v Stian Klaassen | 6-0,6-2 |
| ITF M15 Eindhoven | 2023/08/01 14:40 | Stian Klaassen v Fons Van Sambeek | 7-6,6-3 |
| ITF M15 Eindhoven | 2023/07/31 08:00 | Jack Loge v Stian Klaassen | 2-6,3-6 |
| ITF M15 Eindhoven | 2023/07/30 07:00 | Stian Klaassen v Twan Van Zijl | 6-3,6-1 |
| ITF M15 Metzingen | 2023/07/23 07:30 | Frederic Vogeli v Stian Klaassen | 6-2,6-7,10-5 |
| ITF M15 Alkmaar | 2023/06/26 10:30 | Max Van Nunen v Stian Klaassen | 5-7,1-6 |
| ITF M25 Kachreti | 2024/05/16 06:00 | Christopher Bulus v Roberto Cid Subervi | 2-6,3-6 |
| ITF M25 Kachreti | 2024/05/15 08:30 | Grigoriy Lomakin v Christopher Bulus | 6-7,2-6 |
| ITF M25 Kachreti | 2024/05/13 10:00 | Tamerlan Azizov v Christopher Bulus | 1-6,2-6 |
| ITF M25 Kachreti | 2024/05/12 11:00 | Ben Chetewy Ungar v Christopher Bulus | 2-6,4-6 |
| ITF M15 Tbilisi | 2024/05/06 09:00 | Christopher Bulus v Petr Bar Biryukov | 3-6,4-6 |
| ITF M15 Kursumlijska Banja | 2024/04/25 11:00 | Shendrit Deari v Christopher Bulus | 6-4,6-1 |
| ITF M15 Kursumlijska Banja | 2024/04/24 14:00 | Manuel Lazic v Christopher Bulus | 3-6,1-6 |
| ITF M15 Kursumlijska Banja | 2024/04/15 13:00 | Christopher Bulus v Filiberto Fumagalli | 0-6,4-6 |