Stadium: Court 11 Round: 26 Ground: Clay
| ITF - M25 Montauban | 2021/06/22 10:00 | Erik Crepaldi v Oscar Jose Gutierrez | 1-6,2-6 |
| Challenger - Aix en Provence | 2021/06/15 13:05 | Renzo Olivo v Oscar Jose Gutierrez | 7-6,6-4 |
| Challenger - Aix en Provence | 2021/06/14 08:30 | Mohamed Aziz Dougaz v Oscar Jose Gutierrez | 6-4,4-6,6-4 |
| Challenger - Aix en Provence | 2021/06/13 08:30 | Ronald Slobodchikov v Oscar Jose Gutierrez | 1-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/06/12 11:30 | Marcelo Zormann v Oscar Jose Gutierrez | 3-0 |
| UTR Pro Tennis Series Barcelona | 2021/06/11 11:00 | Bruno P Navarro v Oscar Jose Gutierrez | 6-7,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/06/10 09:30 | Pol Amoros Ramos v Oscar Jose Gutierrez | 4-6,7-6,2-5 |
| UTR Pro Tennis Series Barcelona | 2021/06/09 08:00 | Jose Joaquin M Cisneros v Oscar Jose Gutierrez | 2-6,2-5 |
| ITF - M25 Montauban | 2021/06/22 11:00 | Nathan Seateun v Markus Eriksson | 6-4,7-5 |
| ITF - M25 La Nucia | 2021/03/14 11:00 | Nathan Seateun v Egor Matvievici | 6-2,6-0 |
| ITF - M15 La Nucia | 2021/03/11 13:00 | Nathan Seateun v Nikolas Sanchez Izquierdo | 2-6,1-6 |
| ITF - M15 La Nucia | 2021/03/10 12:42 | Miguel Damas v Nathan Seateun | 3-6,1-6 |
| ITF - M15 La Nucia | 2021/03/10 10:30 | Miguel Damas v Nathan Seateun | 3-6,1-6 |
| ITF - M15 La Nucia | 2021/03/09 15:45 | Nathan Seateun v Miguel Damas | 7-5,6-1 |
| ITF - M15 La Nucia | 2021/03/09 11:00 | Nathan Seateun v Leopold Zima | 6-3,7-6 |
| ITF - M15 Grenoble | 2021/02/07 15:30 | Nathan Seateun v Maxence Broville | 4-6,2-6 |