Stadium: MTA 24 Round: 62 Ground: Clay
| ITF M15 Antalya | 2021/06/20 07:00 | Kenneth Raisma v Inigo G Olasagasti | 6-4,6-3 |
| ITF M15 Marbella | 2021/05/23 08:00 | Inigo G Olasagasti v Jose Joaquin M Cisneros | 3-6,1-6 |
| ITF M15 Cairo | 2021/04/18 08:30 | Yanais Laurent v Inigo G Olasagasti | 6-2,6-1 |
| ITF M15 Cairo | 2021/04/12 08:30 | Inigo G Olasagasti v Manfred Fellin | 2-6,2-6 |
| ITF M15 Cairo | 2021/04/11 11:00 | Zakai Stone v Inigo G Olasagasti | 2-6,5-7 |
| ITF M25 La Nucia | 2021/03/14 13:00 | Inigo G Olasagasti v Leopold Zima | 3-6,1-6 |
| ITF M15 La Nucia | 2021/03/08 11:00 | Inigo G Olasagasti v Ivan Bas Mengual | 2-6,2-6 |
| ITF M25 Villena | 2021/01/31 10:30 | Inigo G Olasagasti v Mattia Bellucci | 3-6,4-6 |
| ITF M15 Shymkent | 2021/06/02 11:45 | Petr Bar Biryukov v Yan Bondarevskiy | 3-6,2-6 |
| ITF M15 Shymkent | 2021/06/01 09:20 | Antonio Campo v Petr Bar Biryukov | 4-6,6-3,10-7 |
| ITF M15 Shymkent | 2021/05/31 06:35 | Alexey Dubinin v Petr Bar Biryukov | 2-6,2-6 |
| ITF M15 Shymkent | 2021/05/24 04:00 | Louroi Martinez v Petr Bar Biryukov | 6-4,6-1 |
| ITF M15 St Petersburg | 2021/04/15 09:00 | Evgeny Tyurnev v Petr Bar Biryukov | 6-1,6-1 |
| ITF M15 St Petersburg | 2021/04/13 09:00 | Petr Bar Biryukov v Kirill Saplin | 6-4,6-1 |
| ITF M15 St Petersburg | 2021/04/06 09:00 | Ivan Nedelko v Petr Bar Biryukov | 6-3,6-1 |
| ITF M15 St Petersburg | 2021/02/11 11:10 | Evgeny Tyurnev v Petr Bar Biryukov | 6-2,7-5 |