Stadium: Court 2 Round: 62 Ground: Hardcourt outdoor
| ITF M15 - Sharm El Sheikh | 2021/03/08 11:30 | Niklas Guttau v Mirko Lagasio | 6-3,4-6,10-4 |
| ITF M15 - Sharm El Sheikh | 2021/03/07 16:00 | Niklas Guttau v Yacoub Makzoume | 6-3,6-2 |
| ITF M15 - Monastir | 2021/02/28 10:30 | Niklas Guttau v Stefano Reitano | 3-6,6-3,7-10 |
| ITF M15 - Monastir | 2021/02/22 08:00 | Samir Hamza Reguig v Niklas Guttau | 6-7,6-1,11-9 |
| ITF M15 - Monastir | 2021/02/21 12:00 | Milan Drinic v Niklas Guttau | 4-6,4-6 |
| German Championship | 2020/12/10 14:00 | Tim Handel v Niklas Guttau | 7-6,7-6 |
| DTB German Pro Series | 2020/06/26 08:00 | Niklas Guttau v Philip Florig | 6-2,7-6 |
| DTB German Pro Series | 2020/06/25 09:20 | Peter Heller v Niklas Guttau | 6-1,6-2 |
| ITF M15 - Sharm El Sheikh | 2021/03/08 13:00 | Tomas Papik v Illya Beloborodko | 6-7,3-6 |
| ITF M15 - Sharm El Sheikh | 2021/03/07 16:00 | Illya Beloborodko v Maik Steiner | 6-4,6-2 |
| ITF M15 - St Petersborg - Kvalifikation | 2021/02/07 08:05 | Lorenzo Bocchi v Illya Beloborodko | 7-6,6-3 |
| ITF - M15 St Petersborg | 2021/01/31 13:40 | Alexander Cozbinov v Illya Beloborodko | 6-4,6-3 |
| ITF M15 - Sharm El Sheikh | 2020/11/11 15:00 | Illya Beloborodko v Dalibor Svrcina | 2-6,5-7 |
| ITF M15 - Sharm El Sheikh | 2020/11/10 09:35 | Illya Beloborodko v Simon Beaupain | 6-3,6-3 |
| ITF M15 - Sharm El Sheikh | 2020/11/09 12:00 | Philip Bachmaier v Illya Beloborodko | 0-6,2-6 |
| ITF M15 - Sharm El Sheikh | 2020/11/08 12:30 | Illya Beloborodko v Janos Fekete | 6-1,6-3 |