Stadium: Court 7 Round: 28 Ground: Clay
| ITF M25 Oviedo | 2021/09/01 12:40 | Oscar Jose Gutierrez v Diego A B Sanchez | 6-3,7-5 |
| ITF M15 Girona | 2021/10/21 11:20 | Alexander Weis v Diego A B Sanchez | 6-4,6-4 |
| ITF M15 Girona | 2021/10/19 09:00 | Diego A B Sanchez v Alexis Musialek | 6-1,6-3 |
| Challenger Alicante | 2021/10/11 09:00 | Santiago Rodriguez Taverna v Diego A B Sanchez | 6-4,6-7,7-5 |
| Challenger Alicante | 2021/10/10 11:00 | Diego A B Sanchez v Wojciech Marek | 6-4,6-3 |
| ITF M15 Cairo | 2021/09/22 09:20 | Diego A B Sanchez v Edoardo Lavagno | 1-6,3-6 |
| ITF M15 Cairo | 2021/09/15 10:05 | Diego A B Sanchez v Stefano Battaglino | 1-6,4-6 |
| 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 06:55 | Miguel Fernando Pereira v Diego A B Sanchez | 1-6,7-6,3-6 |
| ITF M25 Rio do Sul | 2021/10/21 16:10 | Nicolas Zanellato v Oscar Jose Gutierrez | 6-7,6-1,6-1 |
| ITF M25 Rio do Sul | 2021/10/20 16:40 | Amnon Felipe v Oscar Jose Gutierrez | 0-6,4-6 |
| ITF M25 Lima | 2021/10/12 16:20 | Franco Roncadelli v Oscar Jose Gutierrez | 6-0,7-6 |
| ITF M25 Lima | 2021/10/09 15:00 | Oscar Jose Gutierrez v Daniel Dutra Da Silva | 5-7,7-5,4-6 |
| ITF M25 Lima | 2021/10/08 19:10 | Oscar Jose Gutierrez v Conner Huertas Del Pino | 6-3,7-5 |
| ITF M25 Lima | 2021/10/07 17:55 | Oscar Jose Gutierrez v Boris Arias | 6-1,6-4 |
| ITF M25 Lima | 2021/10/05 17:05 | Oscar Jose Gutierrez v Jorge Panta | 6-2,6-2 |
| Challenger Lima | 2021/09/27 15:00 | Johan Nikles v Oscar Jose Gutierrez | 6-4,6-2 |