Stadium: Pista 2 Round: 14 Ground: Hardcourt outdoor
| Challenger Pozoblanco | 2021/07/19 16:50 | Mathias Bourgue v Sergio Martos Gornes | 6-2,6-1 |
| Challenger Amersfoort | 2021/07/11 10:00 | Sergio Martos Gornes v Carlos Sanchez Jover | 4-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/06/12 08:30 | Sergio Martos Gornes v Diego F Flores | 3-6,4-5 |
| UTR Pro Tennis Series Barcelona | 2021/06/11 13:00 | Sergio Martos Gornes v Dominik Palan | 4-6,2-6 |
| Challenger Oeiras | 2021/03/28 10:00 | Sergio Martos Gornes v Denis Yevseyev | 3-6,3-6 |
| Challenger Guayaquil | 2020/11/14 15:00 | Nicolas Alvarez v Sergio Martos Gornes | 6-0,6-2 |
| ITF M25 Murcia | 2020/03/02 13:00 | Zakhar Trapeznikov v Sergio Martos Gornes | 6-4,0-6,10-5 |
| Challenger Sibiu | 2019/09/18 09:55 | Laurent Lokoli v Sergio Martos Gornes | 6-1,6-2 |
| Challenger Prague | 2021/08/24 10:15 | Johannes Haerteis v Alex Rybakov | 4-6,2-6 |
| Challenger Luedenscheid | 2021/08/15 09:30 | Bogdan Bobrov v Johannes Haerteis | 1-6,6-4,6-3 |
| Challenger Meerbusch | 2021/08/08 16:05 | Ivan Nedelko v Johannes Haerteis | 7-6,6-3 |
| Challenger Segovia | 2021/07/27 13:05 | Altug Celikbilek v Johannes Haerteis | 6-3,6-4 |
| Challenger Pozoblanco | 2021/07/20 20:10 | Cem Ilkel v Johannes Haerteis | 6-2,7-6 |
| Challenger Amersfoort | 2021/07/13 08:30 | Mats Moraing v Johannes Haerteis | 6-1,6-0 |
| Challenger Braunschweig | 2021/07/04 11:55 | Johannes Haerteis v Nino Ehrenschneider | 6-3,3-6,4-6 |
| Challenger Prostejov | 2021/06/15 08:30 | Johannes Haerteis v Federico Coria | 1-6,0-6 |