| Challenger Lima | 2021/09/27 15:00 | Johan Nikles v Oscar Jose Gutierrez | 6-4,6-2 |
| Challenger Lima | 2021/09/26 19:50 | Ignacio Buse v Oscar Jose Gutierrez | 4-6,1-6 |
| 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 |