Estadio: Court N-6 Round: 54 Ground: Hardcourt outdoor
| ITF M15 South Bend | 2022/06/20 15:00 | Peter Kuszynski v Presley Thieneman | 6-7,6-7 |
| UTR Pro Tennis Series Florida | 2021/12/18 22:40 | Presley Thieneman v Gabrielius Guzauskas | 6-1,5-7,4-6 |
| UTR Pro Tennis Series Florida | 2021/12/17 19:30 | Noah Schachter v Presley Thieneman | 6-3,6-0 |
| UTR Pro Tennis Series Florida | 2021/12/17 14:00 | Adam Walton v Presley Thieneman | 6-0,6-3 |
| UTR Pro Tennis Series Florida | 2021/12/15 14:00 | Logan Zapp v Presley Thieneman | 6-2,6-2 |
| UTR Pro Tennis Series Florida | 2021/12/13 16:44 | Juan David Velasquez v Presley Thieneman | 6-7,1-5 |
| UTR Pro Tennis Series Florida | 2021/12/15 15:30 | Matthew Segura v John Mercer | 6-1,6-3 |
| UTR Pro Tennis Series Florida | 2021/12/13 17:00 | Shunsuke Mitsui v John Mercer | 6-1,6-0 |
| ITF M15 East Lansing | 2021/11/16 15:00 | John Mercer v Nico Mostardi | 1-6,5-7 |
| ITF M15 East Lansing | 2021/11/15 18:00 | Matthew Dellavedova v John Mercer | 6-7,2-6 |
| ITF M25 Fayetteville | 2019/10/22 14:45 | Murphy Cassone v John Mercer | 6-3,2-6,10-8 |
| ITF M25 Fayetteville | 2019/10/21 15:00 | John Mercer v Ian Chadwell | 6-4,6-4 |
| ITF M15 Pittsburgh | 2019/07/01 14:00 | John Mercer v Andrew Zhang | 2-6,1-6 |
| ITF EE. UU. F33 | 2018/11/18 16:05 | Tim Ruehl v John Mercer | 6-3,6-0 |