Stadium: Bernard Frances Round: 27 Ground: Hardcourt outdoor
| ITF M15 Marbella | 2021/05/27 09:00 | Mats Rosenkranz v Alejandro Moro Canas | 6-7,5-7 |
| ITF M15 Marbella | 2021/05/26 11:05 | Alejandro Moro Canas v Roglan, Albert | 6-2,6-1 |
| ITF M15 Marbella | 2021/05/25 07:30 | Alejandro Moro Canas v Hazem Naw | 6-7,6-1,10-3 |
| ITF M15 Marbella | 2021/05/24 11:00 | Alejandro Moro Canas v Deleersnyder, Clement | 6-4,6-1 |
| ITF M15 Marbella | 2021/05/23 11:00 | Alejandro Moro Canas v Bas Mengual, Ivan | 6-1,6-3 |
| ITF - M25 Vic | 2021/05/17 09:00 | Alejandro Moro Canas v Bondarevskiy, Yan | 6-4,3-6,9-11 |
| ITF M15 Valldoreix | 2021/05/09 12:00 | Niels Visker v Alejandro Moro Canas | 3-6,6-2,10-6 |
| ITF M15 Majadahonda | 2021/05/02 13:15 | Toledo Bague, Pol v Alejandro Moro Canas | 6-4,6-4 |
| ITF M15 Marbella | 2021/05/27 09:20 | Mora, Maxime v Mertens, Yannick | 5-7,0-6 |
| ITF M15 Marbella | 2021/05/25 09:00 | Andreu Garcia, Francisco v Mertens, Yannick | 6-7,1-6 |
| ITF M15 Troisdorf | 2021/05/14 11:00 | Mertens, Yannick v Elmar Ejupovic | 2-6,1-6 |
| ITF M15 Troisdorf | 2021/05/13 09:00 | Mertens, Yannick v Johnson, Luke | 7-6,6-4 |
| ITF M15 Troisdorf | 2021/05/12 12:00 | Mertens, Yannick v Max Wiskandt | 7-6,6-3 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/21 12:05 | Gergely Madarasz v Mertens, Yannick | 6-4,5-7,6-3 |
| ITF M25 Meerbusch | 2021/04/15 10:00 | Erler, Alexander v Mertens, Yannick | 6-3,3-6,6-1 |
| ITF M25 Meerbusch | 2021/04/13 13:30 | Mertens, Yannick v Vanneste, Jeroen | 6-3,6-4 |