Round: 25 Ground: Hardcourt indoor
| US Open, New York, USA | 2015/09/01 23:20 | Ram, Rajeev v Harrison, Ryan | 7-6,6-4,6-1 |
| ATP Cincinnati Qual | 2015/08/15 23:05 | Harrison, Ryan v Thanasi Kokkinakis | 5-7,6-3,6-7 |
| ATP Montreal Qual | 2015/08/08 20:00 | Denis Kudla v Harrison, Ryan | 6-4,6-2 |
| Washington, USA | 2015/08/03 20:00 | James Duckworth v Harrison, Ryan | 6-1,7-6 |
| ATP Washington Qual | 2015/08/01 16:40 | Clezar, Guilherme v Harrison, Ryan | 3-6,7-6,2-6 |
| Newport, USA | 2015/07/14 18:05 | Harrison, Ryan v Sugita, Yuichi | 1-6,7-5,3-6 |
| Wimbledon Qual | 2015/06/22 17:45 | Guido Andreozzi v Harrison, Ryan | 7-6,4-6,6-4 |
| ATP Halle Qual | 2015/06/13 10:30 | Harrison, Ryan v Tatsuma Ito | 4-6,2-6 |
| Challenger Manerbio | 2015/08/25 12:25 | Munoz-De la Nava, Daniel v Bossel, Adrien | 6-3,6-2 |
| Newport, USA | 2015/07/14 17:25 | Bossel, Adrien v Brown, Dustin | 6-7,3-6 |
| ATP Newport Qual | 2015/07/12 17:55 | Bourchier, Harry v Bossel, Adrien | 6-7,4-6 |
| ATP Newport Qual | 2015/07/11 22:45 | Bossel, Adrien v Nielsen, Frederik | 6-1,6-3 |
| Qatar F3, Singles | 2015/04/16 13:00 | Kocevar-Desman, Tom v Bossel, Adrien | 6-4,7-6 |
| Qatar F3, Singles | 2015/04/15 14:50 | Dominik Kellovsky v Bossel, Adrien | 6-7,6-4,4-6 |
| Qatar F3, Singles | 2015/04/14 12:30 | Bava, Haadin v Bossel, Adrien | 1-6,2-6 |
| ITF Qatar F2 | 2015/04/10 12:30 | Bossel, Adrien v Pospisil, Jaroslav | 6-1,6-1 |