Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Santo Domingo | 2021/12/09 13:30 | Colin Markes v Alexis Musialek | 1-6,4-6 |
| ITF M15 Santo Domingo | 2021/12/08 13:30 | Johannes Ingildsen v Colin Markes | 7-6,6-7,6-7 |
| ITF M15 Santo Domingo | 2021/12/02 16:15 | Peter Bertran v Colin Markes | 6-3,6-7,6-4 |
| ITF M15 Santo Domingo | 2021/12/01 16:50 | Yasha Zemel v Colin Markes | 3-6,4-6 |
| ITF M25 Santo Domingo | 2021/11/30 13:00 | Colin Markes v Jesus M Rosario | 6-1,6-2 |
| ITF M25 Santo Domingo | 2021/11/29 15:00 | Colin Markes v Rafael Abdul Salam | 6-2,6-4 |
| ITF M25 Austin | 2021/11/20 18:45 | Eduardo Nava v Colin Markes | 7-6,6-1 |
| ITF M25 Austin | 2021/11/19 16:55 | Colin Markes v Kareem Allaf | 6-2,4-6,7-6 |
| Challenger Antalya | 2021/12/08 11:00 | Mircea-Alexandru Jecan v Nick Chappell | 6-2,7-6 |
| Challenger Antalya | 2021/11/30 07:00 | Duje Ajdukovic v Nick Chappell | 6-4,5-7,7-5 |
| Challenger Puerto Vallarta | 2021/11/23 21:00 | Michael Mmoh v Nick Chappell | 6-2,6-3 |
| Challenger Champaign | 2021/11/17 16:00 | Vasil Kirkov v Nick Chappell | 6-2,6-3 |
| Challenger Champaign | 2021/11/15 21:40 | Emilio Nava v Nick Chappell | 3-6,6-7 |
| Challenger Knoxville | 2021/11/07 19:10 | Nick Chappell v Johannus Monday | 6-4,5-7,3-6 |
| Challenger Charlottesville | 2021/11/02 23:00 | Nick Chappell v Tung-Lin Wu | 4-6,3-6 |
| Challenger Charlottesville | 2021/11/01 14:00 | Nick Chappell v Omni Kumar | 6-3,7-5 |