Round: 26 Ground: Clay
| ITF USA F15 | 2017/04/26 21:10 | Vasil Kirkov v Collin Johns | 1-6,1-6 |
| ITF USA F15 | 2017/04/25 14:00 | Collin Johns v Alexandre Rotsaert | 4-6,1-6 |
| ITF USA F15 | 2017/04/23 15:00 | Collin Johns v Haydn Lewis | 6-2,6-1 |
| ITF USA F15 | 2017/04/21 13:00 | Collin Johns v Tomas Stillman | 6-1,6-3 |
| Challenger Sarasota Qual | 2017/04/15 18:35 | Collin Johns v Blaz Rola | 0-6,6-3,2-6 |
| ITF Japan F5 | 2017/04/04 02:50 | Yusuke Takahashi v Collin Johns | 6-3,6-1 |
| ITF Japan F4 | 2017/03/28 03:00 | Collin Johns v Kaito Itsusaki | 2-6,6-2,4-6 |
| ITF Japan F3 | 2017/03/22 03:35 | Collin Johns v Yusuke Watanuki | 3-6,1-6 |
| ITF USA F15 | 2017/04/26 23:00 | Ivan Yatsuk v Marcus Willis | 3-6,1-6 |
| ITF Great Britain F3 | 2017/02/18 14:00 | Oscar Otte v Marcus Willis | 7-5,7-6 |
| ITF Great Britain F3 | 2017/02/17 11:30 | Filip Horansky v Marcus Willis | 3-6,4-6 |
| ITF Great Britain F3 | 2017/02/16 13:05 | Marcus Willis v Yannick Vandenbulcke | 7-5,6-3 |
| ITF Great Britain F3 | 2017/02/15 10:30 | Marcus Willis v John Lamble | 6-3,6-1 |
| ITF Great Britain F3 | 2017/02/14 10:30 | Marcus Willis v Ronan Joncour | 6-2,6-4 |
| ITF Great Britain F2 | 2017/02/10 12:35 | Marcus Willis v David Guez | 3-6,4-6 |
| ITF Great Britain F2 | 2017/02/09 10:30 | Marcus Willis v Erik Crepaldi | 6-4,6-2 |