# 2011 Knoxville Challenger – Singles

Kei Nishikori was the defending champion but decided not to participate. Jesse Levine won the title, defeating Brian Baker 6–2, 6–3 in the final.

## Seeds

* Michael Russell (quarterfinals)
* Bobby Reynolds (first round)
* Rik de Voest (second round)
* Izak van der Merwe (second round)
* Vasek Pospisil (quarterfinals)
* Uladzimir Ignatik (quarterfinals)
* Michael Yani (second round)
* Greg Jones (first 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 | Semifinals | Semifinals | Final | Final | Final | Final |
| Alt | Jamie Baker | 1 | 7 | 4 | | | | |
| Q | Brian Baker | 6 | 5 | 6 | | | | |
| Q | Brian Baker | 6 | 5 | 6 | Q | Brian Baker | 2 | 3 |
| | | | | | SE | Jesse Levine | 6 | 6 |
| SE | Jesse Levine | 7$^7$ | 6 | | SE | Jesse Levine | 6 | 6 |
| Q | Mirza Bašić | 6$^3$ | 3 | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | M Russell | 7$^7$ | 6 | | | | | | | | | | | | | | | | |
| | R Klaasen | 6$^3$ | 2 | | 1 | M Russell | 6 | 7 | | | | | | | | | | | |
| Q | S Johnson | 6$^4$ | 6 | 7 | Q | S Johnson | 4 | 5 | | | | | | | | | | | |
| | C Guccione | 7$^7$ | 4 | 5 | | | | | | 1 | M Russell | 6 | 1 | 4 | | | | | |
| Alt | J Baker | 6 | 3 | | | | | | | Alt | J Baker | 3 | 6 | 6 | | | | | |
| | D Molchanov | 3 | 1$^d$ | | Alt | J Baker | 6 | 6$^4$ | 7$^7$ | | | | | | | | | | |
| WC | T Sandgren | 4 | 2 | | 7 | M Yani | 4 | 7$^7$ | 6$^4$ | | | | | | | | | | |
| 7 | M Yani | 6 | 6 | | | | | | | | | | | | Alt | J Baker | 1 | 7 | 4 |
| 4 | I van der Merwe | 6 | 7$^7$ | | | | | | | | | | | | Q | B Baker | 6 | 5 | 6 |
| | V Estrella | 3 | 6$^5$ | | 4 | I van der Merwe | 2 | 3 | | | | | | | | | | | |
| | D Matsukevich | 2 | 2 | | Q | B Baker | 6 | 6 | | | | | | | | | | | |
| Q | B Baker | 6 | 6 | | | | | | | Q | B Baker | 4 | 6 | 7$^8$ | | | | | |
| WC | D Kudla | 6$^2$ | 0 | | | | | | | 6 | U Ignatik | 6 | 3 | 6$^6$ | | | | | |
| | V Millot | 7$^7$ | 6 | | | V Millot | 2 | 6$^8$ | | | | | | | | | | | |
| Q | D Kutrovsky | 4 | 6$^6$ | | 6 | U Ignatik | 6 | 7$^{10}$ | | | | | | | | | | | |
| 6 | U Ignatik | 6 | 7$^8$ | | | | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | V Pospisil | 4 | 6 | 6 | | | | | | | | | | | | | |
| WC | R Williams | 6 | 1 | 4 | 5 | V Pospisil | 6 | 6 | | | | | | | | | |
| | F Nielsen | 6 | 7$^7$ | | | F Nielsen | 1 | 2 | | | | | | | | | |
| | R Borvanov | 3 | 6$^5$ | | | | | | | 5 | V Pospisil | 5 | 4 | | | | |
| | A Kuznetsov | 7$^8$ | 6$^3$ | 5 | | | | | | SE | J Levine | 7 | 6 | | | | |
| SE | J Levine | 6$^6$ | 7$^7$ | 7 | SE | J Levine | 6 | 6 | | | | | | | | | |
| | É Chvojka | 3 | 3 | | 3 | R de Voest | 0 | 2 | | | | | | | | | |
| 3 | R de Voest | 6 | 6 | | | | | | | | | | | SE | J Levine | 7$^7$ | 6 |
| 8 | G Jones | 7 | 4 | 3 | | | | | | | | | | Q | M Bašić | 6$^3$ | 3 |
| | H Heliövaara | 5 | 6 | 6 | | H Heliövaara | 7$^7$ | 7$^9$ | | | | | | | | | |
| | F Wolmarans | 4 | 6$^4$ | | Alt | P-L Duclos | 6$^3$ | 6$^7$ | | | | | | | | | |
| Alt | P-L Duclos | 6 | 7$^7$ | | | | | | | | H Heliövaara | 3 | 4 | | | | |
| | A Delić | 7 | 5 | 6 | | | | | | Q | M Bašić | 6 | 6 | | | | |
| WC | J-P Smith | 5 | 7 | 3 | | A Delić | 6 | 3 | 2 | | | | | | | | |
| Q | M Bašić | 6 | 6 | | Q | M Bašić | 3 | 6 | 6 | | | | | | | | |
| 2 | B Reynolds | 3 | 3 | | | | | | | | | | | | | | |