Stadium: Court 3 Round: 62 Ground: Clay
| ITF - M15 Antalya | 2021/06/27 06:30 | Ivan Kazakov v Stefanos Sakellaridis | 1-6,4-6 |
| ITF - M15 Antalya | 2021/06/20 07:00 | Ignacio Carou v Stefanos Sakellaridis | 6-4,6-3 |
| ITF - M15 Antalya | 2021/06/13 07:30 | Lema, Nicolas Agustin v Stefanos Sakellaridis | 6-2,4-6,10-6 |
| ITF - M15 Antalya | 2021/06/09 08:40 | Francisco Comesana v Stefanos Sakellaridis | 6-3,6-1 |
| ITF - M15 Antalya | 2021/06/08 11:55 | Stefanos Sakellaridis v Thiago Cigarran | 7-5,7-6 |
| ITF - M15 Antalya | 2021/06/07 08:25 | Stefanos Sakellaridis v Kirill Mishkin | 6-2,6-2 |
| ITF - M15 Antalya | 2021/06/06 07:30 | Cezar Cretu v Stefanos Sakellaridis | 2-6,6-7 |
| ITF - M15 Antalya | 2021/05/31 08:30 | Franco Roncadelli v Stefanos Sakellaridis | 6-2,6-3 |
| ITF - M15 Antalya | 2021/06/27 06:30 | Garmendia Olasagasti, Inigo v Petr Bar Biryukov | 7-6,1-6,10-5 |
| ITF - M15 Antalya | 2021/06/20 07:00 | Kenneth Raisma v Garmendia Olasagasti, Inigo | 6-4,6-3 |
| ITF M15 Marbella | 2021/05/23 08:00 | Garmendia Olasagasti, Inigo v Miranda Cisneros, Jose Joaquin | 3-6,1-6 |
| ITF M15 Cairo | 2021/04/18 08:30 | Yanais Laurent v Garmendia Olasagasti, Inigo | 6-2,6-1 |
| ITF M15 Cairo | 2021/04/12 08:30 | Garmendia Olasagasti, Inigo v Fellin, Manfred | 2-6,2-6 |
| ITF M15 Cairo | 2021/04/11 11:00 | Stone, Zakai v Garmendia Olasagasti, Inigo | 2-6,5-7 |
| ITF M25 La Nucia | 2021/03/14 13:00 | Garmendia Olasagasti, Inigo v Leopold Zima | 3-6,1-6 |
| ITF M15 La Nucia | 2021/03/08 11:00 | Garmendia Olasagasti, Inigo v Bas Mengual, Ivan | 2-6,2-6 |