| UTR Pro Tennis Series Mulheim | 2021/10/12 07:00 | Ivan Marrero Curbelo v Johann Willems | 2-6,3-5 |
| UTR Pro Tennis Series Mulheim | 2021/10/11 10:00 | Ivan Marrero Curbelo v Eric Vanshelboim | 1-6,0-6 |
| UTR Pro Tennis Series Barcelona | 2021/10/03 10:00 | Alvaro Bueno Gil v Ivan Marrero Curbelo | 2-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/10/01 12:30 | Ivan Marrero Curbelo v Kuzey Cekirge | 1-6,6-7 |
| UTR Pro Tennis Series Barcelona | 2021/09/29 11:15 | Ivan Marrero Curbelo v Bruno P Navarro | 5-7,2-6 |
| UTR Pro Tennis Series Barcelona | 2021/09/28 08:00 | Ivan Marrero Curbelo v Adria Soriano Barrera | 2-6,1-5 |
| UTR Pro Tennis Series Barcelona | 2021/09/27 11:00 | Jordi Garcia Mestre v Ivan Marrero Curbelo | 3-6,6-1,3-6 |
| Challenger Gran Canaria Qual | 2021/02/28 16:05 | Filip Cristian Jianu v Ivan Marrero Curbelo | 5-7,6-3,6-2 |