Stadium: Court 8 Round: 26 Ground: Clay
| ITF M15 Frederiksberg | 2021/08/03 13:05 | Eriksson, Markus v George Loffhagen | 6-7,6-2,6-2 |
| Challenger Tampere | 2021/07/18 08:00 | Bogdan Bobrov v Eriksson, Markus | 7-6,6-4 |
| ATP Bastad | 2021/07/11 09:00 | Eriksson, Markus v Fabbiano, Thomas | 6-7,4-6 |
| ITF M25 Bourg-en-Bresse | 2021/07/01 08:30 | Eriksson, Markus v Clement Tabur | 6-7,6-7 |
| ITF M25 Bourg-en-Bresse | 2021/06/30 07:00 | Eriksson, Markus v Alexandre Aubriot | 6-2,2-6,6-3 |
| ITF M25 Montauban | 2021/06/22 11:00 | Nathan Seateun v Eriksson, Markus | 6-4,7-5 |
| ITF M25 Grasse | 2021/06/17 08:00 | Eriksson, Markus v Lopez San Martin, Alvaro | 2-6,1-6 |
| ITF M25 Grasse | 2021/06/15 13:05 | Eriksson, Markus v Dan Added | 6-4,6-2 |
| ITF M15 Frederiksberg | 2021/08/04 07:55 | Amaury Raynel v Slavic, Nikola | 6-2,4-6,4-6 |
| ITF M15 Frederiksberg | 2021/08/02 12:00 | Leonardo Catani v Slavic, Nikola | 2-6,2-6 |
| UTR Pro Tennis Series Beograd | 2021/07/11 07:00 | Yanais Laurent v Slavic, Nikola | 3-6,4-5 |
| UTR Pro Tennis Series Beograd | 2021/07/10 08:30 | Giacomo Revelli v Slavic, Nikola | 2-6,4-5 |
| UTR Pro Tennis Series Beograd | 2021/07/08 09:00 | Slavic, Nikola v Kolisnyk, Olexiy | 1-6,4-6 |
| UTR Pro Tennis Series Beograd | 2021/07/07 10:30 | Slavic, Nikola v de La Bassetiere, Constant | 6-4,5-4 |
| UTR Pro Tennis Series Beograd | 2021/07/06 14:00 | Slavic, Nikola v Michalis Sakellaridis | 6-3,6-6 |
| UTR Pro Tennis Series Beograd | 2021/07/05 07:30 | Slavic, Nikola v Dusan Obradovic | 6-7,6-7 |