Stadium: Court 1 Round: 54 Ground: Hardcourt outdoor
| ITF M25 Santo Domingo | 2023/06/18 13:00 | Christopher Li v Yanael Lundqvist | 6-3,6-0 |
| ITF M15 East Lansing | 2022/11/16 19:55 | Patrick Fletchall v John Mercer | 6-4,6-4 |
| ITF M25 East Lansing | 2022/11/15 15:00 | Jeremy Schifris v John Mercer | 6-2,6-1 |
| ITF M25 East Lansing | 2022/11/13 16:30 | John Mercer v Stefan Menichella | 2-6,6-2,10-3 |
| ITF M15 Winston-Salem | 2022/11/07 20:30 | Herbert Jody Maginley v John Mercer | 7-5,4-6,10-7 |
| Challenger Lexington | 2022/07/31 22:20 | John Mercer v Alafia Ayeni | 6-3,2-6,4-6 |
| UTR Pro Tennis Series Ann Arbor | 2022/07/29 17:00 | Jacob Bickersteth v John Mercer | 6-0,4-6,6-4 |
| UTR Pro Tennis Series Ann Arbor | 2022/07/27 17:30 | John Mercer v Jacob Perkins | 6-0,6-2 |
| UTR Pro Tennis Series Ann Arbor | 2022/07/25 17:00 | John Mercer v Shourya Verma | 3-6,6-3,6-3 |