Stadium: Court 3 Round: 25 Ground: Hardcourt indoor
| ITF Estonia F1 | 2018/07/18 07:00 | Karl Friberg v Denis Klok | 4-6,6-3,5-7 |
| ITF Estonia F3 | 2018/11/06 12:30 | Aliaksandr Liaonenka v Denis Klok | 7-5,6-2 |
| Challenger Almaty 2 | 2018/09/29 08:15 | Aliaksandr Bury v Denis Klok | 6-3,6-4 |
| ITF Kazakhstan F8 | 2018/09/26 09:15 | Francesco Bessire v Denis Klok | 7-6,6-2 |
| ITF Kazakhstan F8 | 2018/09/24 06:50 | Beibit Zhukayev v Denis Klok | 1-6,3-6 |
| ITF Kazakhstan F7 | 2018/09/20 07:05 | Andrey Chepelev v Denis Klok | 3-6,6-3,6-3 |
| ITF Kazakhstan F7 | 2018/09/19 05:30 | Francesco Bessire v Denis Klok | 3-6,7-6,4-6 |
| ITF Kazakhstan F7 | 2018/09/18 05:05 | Vladislav Dubinsky v Denis Klok | 4-6,1-6 |
| ITF Kazakhstan F6 | 2018/09/15 05:00 | Colin Van Beem v Denis Klok | 3-6,6-4,5-7 |
| ITF Thailand F8 | 2018/11/05 02:00 | Karl Friberg v Abhinav Sanjeev Shanmugam | 6-7,6-3,6-7 |
| ITF Thailand F8 | 2018/11/04 02:00 | Karl Friberg v Kittirat Kerdlaphee | 3-6,6-3,6-2 |
| ITF Vietnam F5 | 2018/11/01 05:15 | Cheng-Yu Yu v Karl Friberg | 6-3,6-3 |
| ITF Vietnam F5 | 2018/10/30 04:35 | Karl Friberg v Goran Markovic | 6-3,6-2 |
| ITF Vietnam F4 | 2018/10/23 05:30 | Karl Friberg v Filip Bergevi | 3-6,2-6 |
| ATP Stockholm | 2018/10/14 13:55 | Peter Polansky v Karl Friberg | 6-4,6-1 |
| ITF Sweden F5 | 2018/10/01 14:00 | Karl Friberg v Otto Virtanen | 3-6,7-5,1-6 |
| ITF Sweden F4 | 2018/09/25 11:00 | Karl Friberg v Otto Virtanen | 6-1,5-7,0-6 |