Stadion: Cancha Central Round: 14 Ground: Clay
| UTR Pro Tennis Series - Florida | 2021/08/21 12:00 | Antonio M-Hidalgo v Ignacio Buse | 2-6,1-0 |
| UTR Pro Tennis Series - Florida | 2021/08/20 12:00 | Kyle Frankel v Ignacio Buse | 2-6,6-7 |
| UTR Pro Tennis Series - Florida | 2021/08/19 14:30 | Ivan Yatsuk v Ignacio Buse | 3-6,6-4,1-5 |
| UTR Pro Tennis Series - Florida | 2021/08/16 14:30 | Ignacio Buse v Mateo Barreiros Reyes | 3-6,6-7 |
| ITF - M15 - Recife | 2021/09/23 14:50 | Marcelo Zormann v Oscar Jose Gutierrez | 6-2,4-6,7-5 |
| ITF - M15 - Recife | 2021/09/22 13:00 | Christian Oliveira v Oscar Jose Gutierrez | 3-6,0-6 |
| ITF - M25 - Madrid | 2021/09/16 11:45 | Pablo Llamas Ruiz v Oscar Jose Gutierrez | 6-3,6-3 |
| ITF - M25 - Madrid | 2021/09/14 09:00 | Pol Toledo Bague v Oscar Jose Gutierrez | 3-6,2-6 |
| ITF - M25 - Oviedo | 2021/09/02 09:00 | Oscar Jose Gutierrez v Alejandro Garcia | 2-6,3-6 |
| ITF - M25 - Oviedo | 2021/09/01 12:40 | Oscar Jose Gutierrez v Diego A B Sanchez | 6-3,7-5 |
| ITF - M25 - Oviedo | 2021/08/31 10:15 | Oscar Jose Gutierrez v Juan Bautista Torres | 6-3,6-4 |
| ITF - M25 - Santander | 2021/08/27 10:30 | Imanol L Morillo v Oscar Jose Gutierrez | 6-3,6-3 |