Stadium: Court 4 Round: 27 Ground: Clay
| ITF M15 Melilla | 2021/09/24 16:30 | Alex M Pujolras v Mario Mansilla Diez | 6-0,6-3 |
| ITF M15 Melilla | 2021/09/24 08:30 | Alex M Pujolras v Noah Lopez | 6-3,6-0 |
| Challenger Seville | 2021/09/06 09:00 | Emilio Nava v Alex M Pujolras | 6-3,6-2 |
| Challenger Seville | 2021/09/05 10:45 | Alex M Pujolras v Vidal Azorin, Jose Fco | 4-6,6-2,6-2 |
| ITF M25 Oviedo | 2021/08/31 14:15 | Alex M Pujolras v Lopez San Martin, Alvaro | 4-6,2-6 |
| ITF M25 Santander | 2021/08/29 09:30 | Nicolas Alvarez Varona v Alex M Pujolras | 7-6,2-6,6-2 |
| ITF M25 Santander | 2021/08/27 10:30 | Alex M Pujolras v Pol Martin Tiffon | 3-6,6-4,6-0 |
| ITF M25 Santander | 2021/08/26 11:15 | Ivan Gakhov v Alex M Pujolras | 4-6,3-6 |
| ITF M15 Melilla | 2021/09/25 07:00 | Mesquida Berg, Oscar v Diego F Flores | 6-3,7-5 |
| ITF M15 Melilla | 2021/09/24 09:00 | Merida Aguilar, Daniel v Mesquida Berg, Oscar | 7-5,3-6,3-6 |
| ITF - M25 Pensacola | 2021/05/20 14:30 | Mesquida Berg, Oscar v Peter Bertran | 4-6,1-6 |
| ITF - M25 Pensacola | 2021/05/19 16:50 | Nick Chappell v Mesquida Berg, Oscar | 5-7,6-4,3-6 |
| ITF - M25 Pensacola | 2021/05/18 16:05 | Juncheng Shang v Mesquida Berg, Oscar | 5-7,5-7 |
| ITF - M25 Pensacola | 2021/05/17 15:00 | Strother, Caleb v Mesquida Berg, Oscar | 5-7,0-6 |
| Fayetteville, AR, Singles Qualifying, M-ITF-USA-31 | 2020/11/02 17:30 | Joshua Sheehy v Mesquida Berg, Oscar | 7-6,3-6,10-8 |
| ITF M15 Cancun | 2020/03/11 14:00 | Estevez Maximiliano v Mesquida Berg, Oscar | 6-2,6-3 |