Stadium: Court 9 Round: 44 Ground: Hardcourt outdoor
| UTR Pro Tennis Series California | 2021/08/25 21:30 | Maier, Jonas v Gianluca Brunkow | 5-7,2-6 |
| UTR Pro Tennis Series California | 2021/08/24 21:00 | Maier, Jonas v 고메즈, 루카스 | 2-6,3-6 |
| UTR Pro Tennis Series California | 2021/08/23 15:00 | Sah, Timothy v Maier, Jonas | 4-6,6-1,6-3 |
| ITF M15 Gdynia | 2021/08/08 08:30 | Maier, Jonas v Pawlak, Piotr | 4-6,1-6 |
| ITF M15 Frederiksberg | 2021/08/01 10:00 | Overbeck, Carl Emil v Maier, Jonas | 6-2,6-3 |
| UTR Pro Tennis Series Nevada | 2021/06/24 16:30 | 라가에브, 닉 v Maier, Jonas | 6-4,5-2 |
| UTR Pro Tennis Series Nevada | 2021/06/23 18:00 | 키겔, 맥 v Maier, Jonas | 6-3,6-7,4-6 |
| UTR Pro Tennis Series Nevada | 2021/06/21 15:00 | Bjorn Swenson v Maier, Jonas | 6-4,6-4 |
| ITF M15 Cancun | 2021/09/20 15:00 | Samuel Sanchez v 올라야, 조지 알레잔드로 | 6-3,5-7,10-4 |