Stadium: Indoor 1 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Manacor | 2022/01/04 10:00 | Stefanos Sakellaridis v Michalis Sakellaridis | 3-6,6-3,8-10 |
| UTR Pro Tennis Series Barcelona | 2021/12/16 10:30 | Xavier Matas Ortega v Stefanos Sakellaridis | 6-4,6-2 |
| UTR Pro Tennis Series Barcelona | 2021/12/15 08:30 | Stefanos Sakellaridis v Ivan Denisov | 6-0,7-5 |
| UTR Pro Tennis Series Barcelona | 2021/12/14 09:30 | Stefanos Sakellaridis v Andres F Canovas | 3-6,7-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/12/12 17:00 | John Echeverria v Stefanos Sakellaridis | 6-7,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/12/11 14:00 | Stefanos Sakellaridis v Alexis Klegou | 3-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/12/10 08:00 | Ilya Snitari v Stefanos Sakellaridis | 6-4,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/12/09 09:30 | Sergio Redondo v Stefanos Sakellaridis | 3-6,2-5 |
| ITF M15 Monastir | 2021/12/12 10:00 | Roman Ruenger v Alessandro Bellifemine | 2-6,5-7 |
| ITF M15 Monastir | 2021/12/05 09:00 | Roman Ruenger v Mattias Southcombe | 3-6,5-7 |
| ITF M15 Parnu | 2021/10/25 07:00 | Roman Ruenger v Timofey Stepanov | 2-6,1-6 |
| ITF M25 Ricany | 2021/08/29 10:30 | Roman Ruenger v Filip Kana | 4-6,2-6 |
| ITF M15 Sibenik | 2021/05/17 14:40 | Rimpei Kawakami v Roman Ruenger | 6-2,6-2 |
| ITF M15 Sibenik | 2021/05/16 12:30 | Liam Schiemann v Roman Ruenger | 3-6,2-6 |
| ITF Netherlands F5 | 2018/08/18 08:00 | Kevin Kaczynski v Roman Ruenger | 6-1,6-0 |