Round: 60 Ground: Clay
| ITF USA F5 | 2016/01/24 18:30 | Bryde, Trent v Callahan, Hunter | 3-6,5-7 |
| ITF USA F5 | 2016/01/22 19:00 | Callahan, Hunter v Oswald, Jack | 6-1,6-1 |
| ITF USA F4 | 2016/01/17 17:30 | Bryde, Trent v Callahan, Hunter | 7-6,7-6 |
| ITF Greece F11 | 2015/11/14 10:00 | Callahan, Hunter v van Rijthoven, Tim | 7-6,4-6,1-6 |
| ITF Greece F11 | 2015/11/13 08:30 | Callahan, Hunter v Stefanos Tsitsipas | 6-7,6-4,6-4 |
| ITF Greece F11 | 2015/11/12 08:30 | Lazov, Alexander v Callahan, Hunter | 6-7,6-7 |
| ITF Greece F10 Qual | 2015/11/01 11:00 | Khomentovskiy, Matvey v Callahan, Hunter | 4-6,7-5,6-3 |
| ITF Greece F9 Qual | 2015/10/24 09:00 | Stephanos Schinas v Callahan, Hunter | 4-6,7-5,6-3 |
| ITF USA F5 | 2016/01/22 19:30 | Rowland Phillips v Gooch, Damon | 3-6,7-6,7-5 |
| ITF USA F3 Qual | 2016/01/09 19:00 | Hady Habib v Rowland Phillips | 7-5,6-0 |
| ITF USA F3 Qual | 2016/01/08 21:30 | Mermersky, Sebastian v Rowland Phillips | 2-6,1-6 |
| Coupe Davis | 2015/07/25 14:30 | Zatar, Ayed v Rowland Phillips | 6-4,6-7,7-5 |
| Coupe Davis | 2015/07/24 16:00 | Major, Kevin v Rowland Phillips | 5-7,0-6 |