Stadium: V5 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Rochester | 2019/06/25 18:20 | Colin Markes v Kyle Seelig | 2-6,1-6 |
| ITF M15 Rochester | 2019/06/24 17:00 | Colin Markes v Nevin Arimilli | 5-7,7-6,10-8 |
| ITF M25 Tulsa | 2019/06/20 19:10 | Colin Markes v Alexander Sarkissian | 6-3,1-6,4-6 |
| ITF M25 Tulsa | 2019/06/19 17:40 | Alexander Lebedev v Colin Markes | 3-6,5-7 |
| ITF M25 Tulsa | 2019/06/18 17:40 | Colin Markes v Nicaise Muamba | 7-5,6-3 |
| ITF M25 Tulsa | 2019/06/17 15:00 | Colin Markes v Bradley Frye | 6-4,6-4 |
| ITF USA F34 | 2018/11/26 22:25 | Colin Markes v Jenson Brooksby | 7-5,3-6,3-6 |
| ITF USA F34 | 2018/11/25 17:35 | Colin Markes v Jaime Bendeck | 7-6,6-0 |