Stadium: Center Court Round: 19 Ground: Hardcourt outdoor
| Challenger Marbella | 2021/03/30 10:20 | Carlos Gomez-Herrera v Carlos Gimeno Valero | 7-6,7-6 |
| Challenger Segovia | 2021/07/25 15:20 | Carlos Gimeno Valero v Alejandro Mendoza | 6-1,6-1 |
| Challenger Almaty | 2021/06/16 04:00 | Carlos Gimeno Valero v Brayden Schnur | 4-6,6-7 |
| Challenger Almaty | 2021/06/15 04:00 | Chun Hsin Tseng v Carlos Gimeno Valero | 5-7,6-4,2-6 |
| Challenger Almaty | 2021/06/08 06:55 | Evan Furness v Carlos Gimeno Valero | 1-6,6-2,6-3 |
| Challenger Oeiras | 2021/05/28 15:05 | Carlos Gimeno Valero v Holger Rune | 2-6,4-6 |
| Challenger Oeiras | 2021/05/26 10:00 | Carlos Gimeno Valero v Viktor Galovic | 6-4,6-2 |
| Challenger Oeiras | 2021/05/25 10:00 | Carlos Gimeno Valero v Vitaliy Sachko | 6-2,6-1 |
| ITF M25 Vic | 2021/05/23 09:30 | Carlos Gimeno Valero v Pedro Cachin | 1-6,6-3,6-4 |
| Challenger Segovia | 2021/07/25 15:10 | Nicolas H Cuesta v Carlos Gomez-Herrera | 1-6,0-6 |
| Challenger Pozoblanco | 2021/07/19 20:45 | Carlos Gomez-Herrera v Hiroki Moriya | 6-3,3-6,0-6 |
| Challenger Aix en Provence | 2021/06/13 10:00 | Carlos Gomez-Herrera v Titouan Droguet | 5-7,4-6 |
| ATP Belgrade | 2021/05/23 10:50 | Carlos Gomez-Herrera v Alex Molcan | 3-6,6-7 |
| ATP Belgrade | 2021/05/22 13:25 | John-Patrick Smith v Carlos Gomez-Herrera | 4-6,6-7 |
| ATP Marbella | 2021/04/05 11:35 | Mario Vilella Martinez v Carlos Gomez-Herrera | 6-3,3-6,6-3 |
| ATP Marbella | 2021/04/04 13:30 | Carlos Gomez-Herrera v Martin Klizan | 6-4,6-1 |
| Challenger Marbella | 2021/04/01 10:00 | Taro Daniel v Carlos Gomez-Herrera | 7-5,6-4 |