Round: 60 Ground: Clay
| ITF Greece F11 | 2015/11/14 10:00 | Hunter Callahan v Tim Van Rijthoven | 7-6,4-6,1-6 |
| ITF Greece F11 | 2015/11/13 08:30 | Hunter Callahan v Stefanos Tsitsipas | 6-7,6-4,6-4 |
| ITF Greece F11 | 2015/11/12 08:30 | Alexander Lazov v Hunter Callahan | 6-7,6-7 |
| ITF Greece F10 Qual | 2015/11/01 11:00 | Matvey Khomentovskiy v Hunter Callahan | 4-6,7-5,6-3 |
| ITF Greece F9 Qual | 2015/10/24 09:00 | Stephanos Schinas v Hunter Callahan | 4-6,7-5,6-3 |
| Challenger Columbus Qual | 2015/09/20 15:20 | Peter Kobelt v Hunter Callahan | 6-4,6-1 |
| ITF Canada F9 Qual | 2015/09/15 14:00 | Filip Peliwo v Hunter Callahan | 6-4,6-2 |
| ITF Canada F9 Qual | 2015/09/08 15:30 | Damon Gooch v Hunter Callahan | 7-5,7-6 |