# 2015 Knoxville Challenger – Singles

Adrian Mannarino was the defending champion, but chose not to compete this year.
Daniel Evans won the title , defeating Frances Tiafoe in the final 5–7, 6–1, 6–3 .

## Seeds

* Malek Jaziri (first round)
* Austin Krajicek (second round)
* Tim Smyczek (second round)
* Ryan Harrison (first round)
* James Duckworth (quarterfinals)
* John-Patrick Smith (second round)
* Alejandro Falla (first round)
* Blaž Rola (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| Dennis Novikov | 4 | 4 | | | | |
| Frances Tiafoe | 6 | 6 | | | | |
| Frances Tiafoe | 6 | 6 | Frances Tiafoe | 7 | 1 | 3 |
| | | | Daniel Evans | 5 | 6 | 6 |
| Jared Donaldson | 3 | 4 | Daniel Evans | 5 | 6 | 6 |
| Daniel Evans | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 1 | M Jaziri | 1 | 2 | | | | | | | | | | | | | |
| WC | S Kozlov | 6 | 6 | | WC | S Kozlov | 3 | 6$^4$ | | | | | | | | |
| Q | D Smethurst | 5 | 5 | | | D Novikov | 6 | 7$^7$ | | | | | | | | |
| | D Novikov | 7 | 7 | | | | | | | | D Novikov | 7 | 6 | | | |
| WC | M McDonald | 4 | 3 | | | | | | | 5 | J Duckworth | 5 | 4 | | | |
| Q | S Bangoura | 6 | 6 | | Q | S Bangoura | 6 | 3 | 4 | | | | | | | |
| | F Nielsen | 6$^2$ | 4 | | 5 | J Duckworth | 4 | 6 | 6 | | | | | | | |
| 5 | J Duckworth | 7$^7$ | 6 | | | | | | | | | | | D Novikov | 4 | 4 |
| 4 | R Harrison | 2 | 4 | | | | | | | | | | | F Tiafoe | 6 | 6 |
| | B Kavčič | 6 | 6 | | | B Kavčič | 4 | 6 | 1 | | | | | | | |
| WC | Luis Valero | 6 | 1 | 3 | | F Tiafoe | 6 | 4 | 6 | | | | | | | |
| | F Tiafoe | 3 | 6 | 6 | | | | | | | F Tiafoe | 6 | 3 | | | |
| | M Michalička | 1 | 3 | | | | | | | | T Sandgren | 2 | 0$^r$ | | | |
| | T Sandgren | 6 | 6 | | | T Sandgren | 6 | 3 | 6 | | | | | | | |
| | G Lapentti | 6 | 3 | 4 | 8 | B Rola | 4 | 6 | 3 | | | | | | | |
| 8 | B Rola | 4 | 6 | 6 | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 7 | A Falla | 6$^5$ | 6$^5$ | | | | | | | | | | | | |
| | L Broady | 7$^7$ | 7$^7$ | | | L Broady | 6 | 2 | 6 | | | | | | |
| WC | H Reese | 1 | 0 | | | M Zverev | 3 | 6 | 3 | | | | | | |
| | M Zverev | 6 | 6 | | | | | | | L Broady | 4 | 4 | | | |
| | J Donaldson | 6 | 4 | 6 | | | | | | J Donaldson | 6 | 6 | | | |
| Q | E Quigley | 4 | 6 | 4 | | J Donaldson | 7 | 7$^8$ | | | | | | | |
| SE | T Paul | 4 | 4 | | 3 | T Smyczek | 5 | 6$^6$ | | | | | | | |
| 3 | T Smyczek | 6 | 6 | | | | | | | | | | J Donaldson | 3 | 4 |
| 6 | J-P Smith | 6 | 6 | | | | | | | | | | D Evans | 6 | 6 |
| | T Fritz | 4 | 4 | | 6 | J-P Smith | 6$^4$ | 4 | | | | | | | |
| Q | A Bossel | 6$^6$ | 6$^{11}$ | | | B Fratangelo | 7$^7$ | 6 | | | | | | | |
| | B Fratangelo | 7$^8$ | 7$^{13}$ | | | | | | | B Fratangelo | 4 | 6$^4$ | | | |
| | D Nguyen | 2 | 6 | 3 | | | | | | D Evans | 6 | 7$^7$ | | | |
| | D Evans | 6 | 2 | 6 | | D Evans | 6 | 6 | | | | | | | |
| SE | N Rubin | 5 | 3 | | 2 | A Krajicek | 3 | 2 | | | | | | | |
| 2 | A Krajicek | 7 | 6 | | | | | | | | | | | | |