| Challenger Champaign | 11/14 16:00 | 25 | [146] Emilio Nava v Ethan Quinn [374] | 3-6,2-6 | |
| Challenger Knoxville | 11/07 15:00 | 25 | [267] Tennys Sandgren v Ethan Quinn [374] | 4-6,7-6,7-6 | |
| Challenger Charlottesville | 11/04 19:25 | 28 | [376] Aidan Mayo v Ethan Quinn [458] | 3-6,6-4,6-3 | |
| Challenger Charlottesville | 11/03 22:00 | 27 | [126] Benoit Paire v Ethan Quinn [458] | 6-7,2-6 | |
| Challenger Charlottesville | 11/02 16:00 | 26 | [458] Ethan Quinn v Emilio Nava [148] | 6-3,6-1 | |
| Challenger Charlottesville | 10/31 14:00 | 25 | [458] Ethan Quinn v Mitchell Krueger [294] | 3-6,7-6,6-4 | |
| Challenger Charlottesville | 10/30 14:00 | 19 | Ethan Quinn v Dylan Dietrich | 7-6,6-3 | |
| Challenger Charlottesville | 10/29 14:00 | 14 | Ethan Quinn v James Hopper | 6-0,6-3 | |
| Challenger Fairfield | 10/09 19:15 | 19 | [390] Strong Kirchheimer v Ethan Quinn [466] | 7-6,7-5 | |
| Challenger Fairfield | 10/08 21:35 | 14 | Kiranpal Pannu v Ethan Quinn | 2-6,7-6,4-6 | |
| Challenger Tiburon | 10/01 19:40 | 14 | [493] Ethan Quinn v Aidan Mayo [408] | 4-6,4-6 | |
| Challenger Charleston | 09/29 17:50 | 27 | [493] Ethan Quinn v Abdullah Shelbayh [274] | 2-6,4-6 | |
| Challenger Charleston | 09/28 17:45 | 26 | [493] Ethan Quinn v Aidan Mayo [408] | 7-5,7-5 | |
| Challenger Charleston | 09/26 15:30 | 25 | [202] Alexis Galarneau v Ethan Quinn [492] | 2-6,6-7 | |
| Challenger Columbus | 09/19 16:00 | 25 | [399] Federico Agustin Gomez v Ethan Quinn [492] | 7-5,7-6 | |
| Challenger Cary | 09/12 00:20 | 25 | [207] Zachary Svajda v Ethan Quinn [491] | 4-6,6-3,6-4 | |
| US Open | 08/28 20:30 | 23 | [76] Bernabe Zapata Miralles v Ethan Quinn [475] | 6-4,6-4,6-3 | |
| Challenger Stanford | 08/14 18:45 | 25 | [475] Ethan Quinn v Emilio Nava [187] | 1-6,2-6 | |
| Challenger Cary | 08/07 20:30 | 25 | [465] Ethan Quinn v Gijs Brouwer [138] | 7-6,3-6,1-6 | |
| ATP Atlanta | 07/24 17:00 | 25 | [394] Ethan Quinn v Aleksandar Vukic [82] | 6-7,3-6 | |
| ATP Newport | 07/19 17:00 | 26 | [14] Tommy Paul v Ethan Quinn [434] | 6-4,6-2 | |
| ATP Newport | 07/18 19:45 | 25 | [434] Ethan Quinn v Mukund Sasikumar [356] | 6-3,6-1 | |
| Challenger Chicago | 07/15 00:30 | 27 | [477] Ethan Quinn v Juncheng Shang [155] | 5-7,1-6 | |
| Challenger Chicago | 07/13 18:20 | 26 | [326] Tristan Schoolkate v Ethan Quinn [477] | 6-4,3-6,2-6 | |
| Challenger Chicago | 07/11 15:00 | 25 | [399] Ernesto Escobedo v Ethan Quinn [477] | 6-7,6-0,4-6 | |
| Challenger Bloomfield Hills | 07/05 14:00 | 25 | [385] Mukund Sasikumar v Ethan Quinn [477] | 7-5,4-6,7-6 | |
| ITF M25 Tulsa | 06/24 15:00 | 26 | Daniel Rodrigues v Ethan Quinn | Cancelled | |
| ITF M25 Tulsa | 06/23 13:55 | 27 | [245] Adam Walton v Ethan Quinn [395] | 6-2,7-6 | |
| ITF M25 Tulsa | 06/22 17:05 | 26 | Braden Shick v Ethan Quinn | Retired | |
| ITF M25 Tulsa | 06/21 14:00 | 25 | Karl Poling v Ethan Quinn | 6-7,6-3,6-7 |