| 27.11.17 | q 1 | Felipe Acosta (ARG) | Harry Fowler | 6-710, 6-1, 7-62 |  | match details |  USA F39 | I. hard |
| 16.10.17 | qual. | Ricardo Rodriguez-Pace | Harry Fowler | 6-1, 6-3 | | match details | USA F34 | Hard |
| 16.10.17 | q 1 | Harry Fowler | Dennis Boisseau | 6-2, 6-3 |  | match details |
| 16.10.17 | q 2 | Harry Fowler | Tigre Hank | 5-7, 6-3, 6-1 | | match details |
| 01.07.13 | q 1 | Nicholas Alexander Reyes | Harry Fowler | 6-1, 6-4 | | match details | USA F18 | Clay |
| 10.06.13 | q 1 | Tomas Marini | Harry Fowler | 4-6, 6-2, 0-1, Harry Fowler - retired | | match details |  Mexico F12 | Hard |
| 03.06.13 | q 1 | Eduardo Yahir Orozco Rangel | Harry Fowler | 6-1, 1-6, 6-2 | | match details | Mexico F11 | Hard |
| 13.05.13 | q 1 | Guillermo Duenas Munoz | Harry Fowler | 0-6, 6-4, 3-1, Harry Fowler - retired | | match details | Mexico F8 | Hard |
| 25.02.13 | q 1 | Alexis Klegou | Harry Fowler | 6-4, 6-3 | | match details | USA F6 | Hard |
| 18.02.13 | q 1 | Harry Fowler | Ognjen Samardzic | 6-1, 6-4 | | match details | USA F5 | Hard |
| 18.02.13 | q 2 | Harry Fowler | Kevin King | 7-64, 6-3 | | match details |
| 18.02.13 | qual. | Daniel Nguyen | Harry Fowler | 6-2, 6-3 | | match details |
| 09.07.12 | 1st round | Chase Buchanan | Harry Fowler | 6-2, 6-4 | | match details | USA F19 | Clay |
| 02.07.12 | 1st round | Jason Tahir | Harry Fowler | 6-3, 6-0 | | match details | USA F18 | Clay |
| 07.04.12 | q 1 | Nicholas Naumann | Harry Fowler | 7-69, 6-3 | | match details | Houston | Clay |
| 19.09.11 | 1st round | Denis Kudla | Harry Fowler | 6-1, 6-2 | | match details | USA F24 | Hard |
| 25.07.11 | 1st round | Dimitar Kutrovsky | Harry Fowler | 6-1, 6-3 | | match details | USA F20 | Hard |
| 11.07.11 | 1st round | Gustavo Guerses | Harry Fowler | 3-6, 6-4, 6-3 | | match details | USA F18 | Clay |
| 04.07.11 | 1st round | Harry Fowler | David Emery (1982) | 7-62, 6-2 | | match details | USA F17 | Clay |
| 04.07.11 | 1/4 | Chase Buchanan | Harry Fowler | 7-5, 6-2 | | match details |
| 04.07.11 | 2nd round | Harry Fowler | Nicolas Meister | 6-4, 6-2 | | match details |
| 21.02.11 | 1st round | Daniel Cox | Harry Fowler | 6-3, 4-6, 6-0 | | match details | USA F5 | Hard |
| 07.09.09 | 1st round | Jozef Kovalik | Harry Fowler | 6-4, 7-65 | | match details | U.S. Open | Hard |
| 01.07.09 | 3rd round | Dino Marcan | Harry Fowler | 6-0, 6-4 | | match details |  Wimbledon (juniors) | Grass |
| 30.06.09 | 2nd round | Harry Fowler | Ashley Hewitt | 3-6, 6-3, 6-4 | | match details |
| 29.06.09 | 1st round | Harry Fowler | Emanuele Molina | 7-62, 5-7, 9-7 | | match details |
| 01.06.09 | 2nd round | Yannik Reuter | Harry Fowler | 6-3, 6-3 | | match details |  French Open | Clay |
| 31.05.09 | 1st round | Harry Fowler | Romain Arneodo | 6-1, 6-3 | | match details |
| 11.05.09 | q 1 | Harry Fowler | Giacomo Miccini | 6-4, 3-0, Giacomo Miccini - retired | | match details | Sarasota Challenger | Clay |
| 11.05.09 | q 2 | Vladimir Obradovic | Harry Fowler | 6-2, 3-6, 6-1 | | match details |
| 04.04.09 | q 1 | Alexander Peya | Harry Fowler | 6-1, 6-1 | | match details | Houston | Clay |
| 23.02.09 | 1st round | Fritz Wolmarans | Harry Fowler | 6-2, 6-1 | | match details | USA F5 | Hard |
| 25.01.09 | 1st round | Stephen Hoh | Harry Fowler | 4-6, 6-3, 6-2 | | match details |  Australian Open | Hard |
| 01.09.08 | 1st round | Alessandro Giannessi | Harry Fowler | 6-4, 6-75, 7-63 | | match details | U.S. Open | Hard |
| 12.04.08 | q 1 | Alexander Reichel | Harry Fowler | 6-3, 6-0 | | match details | Houston | Clay |
