Stadium: Court 1 Round: 54 Ground: Hardcourt outdoor
| ITF M15 - Naples | 2021/10/07 15:00 | Antoine Cornut-Chauvinc v Oscar Mesquida Berg | 6-0,6-2 |
| ITF M15 - Naples | 2021/10/06 15:25 | John Bernard v Oscar Mesquida Berg | 6-7,1-6 |
| ITF M15 - Melilla | 2021/09/25 07:00 | Oscar Mesquida Berg v Diego F Flores | 6-3,7-5 |
| ITF M15 - Melilla | 2021/09/24 09:00 | Daniel Merida Aguilar v Oscar Mesquida Berg | 7-5,3-6,3-6 |
| ITF M25 - Pensacola | 2021/05/20 14:30 | Oscar Mesquida Berg v Peter Bertran | 4-6,1-6 |
| ITF M25 - Pensacola | 2021/05/19 16:50 | Nick Chappell v Oscar Mesquida Berg | 5-7,6-4,3-6 |
| ITF M25 - Pensacola | 2021/05/18 16:05 | Juncheng Shang v Oscar Mesquida Berg | 5-7,5-7 |
| ITF M25 - Pensacola | 2021/05/17 15:00 | Caleb Strother v Oscar Mesquida Berg | 5-7,0-6 |
| ITF M25 - Calabasas | 2021/10/26 20:00 | Michael Shabaz v Keenan Mayo | 6-4,3-6,10-6 |
| ITF M25 - Calabasas | 2021/10/26 17:00 | Kyle Overmyer v Keenan Mayo | 1-6,2-6 |
| UTR Pro Tennis Series - Sacramento | 2021/10/04 16:30 | Emon Van Loben Sels v Keenan Mayo | 5-7,7-6,5-6 |
| UTR Pro Tennis Series - Californien | 2021/09/01 18:00 | Keenan Mayo v Ryan Nuno | 6-3,3-0 |
| UTR Pro Tennis Series - Californien | 2021/08/30 18:00 | Keenan Mayo v Aidan Mayo | 3-6,4-5 |
| UTR Pro Tennis Series - Californien | 2021/08/29 19:50 | Maximilian Wild v Keenan Mayo | 6-7,0-5 |
| UTR Pro Tennis Series - Californien | 2021/08/24 21:30 | Keenan Mayo v Warren Wood | 0-6,3-6 |
| UTR Pro Tennis Series - Californien | 2021/08/23 23:15 | Keenan Mayo v Alfredo Perez | 3-6,1-6 |