| ITF M25 Santander | 2021/08/24 10:15 | Kuzey Cekirge v Oscar Jose Gutierrez | 7-5,2-6,1-6 |
| UTR Pro Tennis Series Bucarest | 2021/06/04 10:00 | Oscar Jose Gutierrez v Kuzey Cekirge | 6-3,6-2 |
| UTR Pro Tennis Series Barcellona | 2021/12/08 13:57 | Oscar Jose Gutierrez v Vlad Cristian Breazu | 1-6,6-3,5-4 |
| UTR Pro Tennis Series Barcellona | 2021/12/07 10:30 | Oscar Jose Gutierrez v Jordan Correia | 0-6,5-7 |
| UTR Pro Tennis Series Barcellona | 2021/12/06 14:40 | Oscar Jose Gutierrez v Sergio Davila Godoy | 6-3,5-1 |
| Challenger San Paolo | 2021/11/29 13:00 | Oscar Jose Gutierrez v Hernan Casanova | 7-5,6-7,0-6 |
| ITF M25 Aparecida De Goiania | 2021/11/14 16:00 | Oscar Jose Gutierrez v Daniel Dutra Da Silva | 6-0,6-4 |
| ITF M25 Aparecida De Goiania | 2021/11/13 11:00 | Oscar Jose Gutierrez v Gustavo Heide | 6-4,6-3 |
| ITF M25 Aparecida De Goiania | 2021/11/12 14:25 | Leonardo Aboian v Oscar Jose Gutierrez | 5-7,2-6 |
| ITF M25 Aparecida De Goiania | 2021/11/11 19:40 | Caio Gruber v Oscar Jose Gutierrez | 1-6,3-6 |
| UTR Pro Tennis Series Barcellona | 2021/12/08 09:00 | Sergio Davila Godoy v Kuzey Cekirge | 2-6,6-6 |
| UTR Pro Tennis Series Barcellona | 2021/12/06 13:30 | Jordan Correia v Kuzey Cekirge | 5-7,7-6,6-3 |
| UTR Pro Tennis Series Barcellona | 2021/11/27 09:30 | Thomas Laurent v Kuzey Cekirge | 6-2,5-1 |
| UTR Pro Tennis Series Barcellona | 2021/11/26 17:00 | Jay Friend v Kuzey Cekirge | 2-6,6-6 |
| UTR Pro Tennis Series Barcellona | 2021/11/26 11:00 | Tomas C Abasolo v Kuzey Cekirge | 3-6,4-6 |
| UTR Pro Tennis Series Barcellona | 2021/11/25 13:00 | Ilie Babinciuc v Kuzey Cekirge | 4-6,4-6 |
| UTR Pro Tennis Series Barcellona | 2021/11/22 08:00 | Kuzey Cekirge v Vlad Cristian Breazu | 7-5,4-6,2-6 |
| UTR Pro Tennis Series Barcellona | 2021/11/13 08:30 | Kuzey Cekirge v Alexis Klegou | 1-6,2-6 |