# 2012 Knoxville Challenger – Singles

Jesse Levine was the defending champion but was defeated in the First Round by Tennys Sandgren. Michael Russell won the final 6–3, 6–2 against Bobby Reynolds.

## Seeds

* Jesse Levine (first round)
* Alex Bogomolov Jr. (first round, retired because of a shoulder injury)
* Michael Russell (champion)
* Mischa Zverev (second round)
* Ryan Sweeting (second round)
* Bobby Reynolds (final)
* Tim Smyczek (semifinals)
* Denis Kudla (quarterfinals)

## 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 | Final | Final | Final | Final |
| | Samuel Groth | 6$^3$ | 6$^1$ | | | | |
| 3 | Michael Russell | 7$^7$ | 7$^7$ | | | | |
| 3 | Michael Russell | 7$^7$ | 7$^7$ | 3 | Michael Russell | 6 | 6 |
| | | | | 6 | Bobby Reynolds | 3 | 2 |
| 7 | Tim Smyczek | 4 | 6$^5$ | 6 | Bobby Reynolds | 3 | 2 |
| 6 | Bobby Reynolds | 6 | 7$^7$ | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | J Levine | 6$^4$ | 6 | 3 | | | | | | | | | | | | | |
| | T Sandgren | 7$^7$ | 3 | 6 | | T Sandgren | 7$^7$ | 6 | | | | | | | | | |
| | A Bossel | 6 | 6 | | | A Bossel | 6$^2$ | 2 | | | | | | | | | |
| WC | Jarryd Chaplin | 2 | 4 | | | | | | | T Sandgren | 6$^2$ | 1 | | | | | |
| | S Groth | 4 | 6 | 7$^7$ | | | | | | S Groth | 7$^7$ | 6 | | | | | |
| LL | F Wolmarans | 6 | 1 | 6$^4$ | | S Groth | 7$^7$ | 7 | | | | | | | | | |
| | S-Y Jeong | 5 | 3 | | 5 | R Sweeting | 6$^3$ | 5 | | | | | | | | | |
| 5 | R Sweeting | 7 | 6 | | | | | | | | | | | | S Groth | 6$^3$ | 6$^1$ |
| 3 | M Russell | 6 | 6 | | | | | | | | | | | 3 | M Russell | 7$^7$ | 7$^7$ |
| WC | E Quigley | 2 | 2 | | 3 | M Russell | 6 | 6 | | | | | | | | | |
| Q | D Britton | 6 | 6 | | Q | D Britton | 3 | 3 | | | | | | | | | |
| WC | C Harrison | 3 | 4 | | | | | | 3 | M Russell | 4 | 7$^7$ | 6 | | | | |
| | B Klahn | 7$^7$ | 4 | 6 | | | | | 8 | D Kudla | 6 | 6$^5$ | 3 | | | | |
| | J-P Smith | 6$^2$ | 6 | 3 | | B Klahn | 2 | 2 | | | | | | | | | |
| | J Sock | 3 | 6 | 6$^5$ | 8 | D Kudla | 6 | 6 | | | | | | | | | |
| 8 | D Kudla | 6 | 2 | 7$^7$ | | | | | | | | | | | | | |

### 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 |
| 7 | T Smyczek | 6$^6$ | 6 | 7$^7$ | | | | | | | | | | | | | |
| | A Bogdanovic | 7$^8$ | 2 | 6$^5$ | 7 | T Smyczek | 7 | 7 | | | | | | | | | |
| | M Lammer | 1 | 7$^8$ | 4 | | I van der Merwe | 5 | 5 | | | | | | | | | |
| | I van der Merwe | 6 | 6$^6$ | 6 | | | | | | 7 | T Smyczek | 6 | 6 | | | | |
| | R Williams | 6$^3$ | 6 | 7$^7$ | | | | | | | R Williams | 3 | 4 | | | | |
| Q | A Krajicek | 7$^7$ | 4 | 6$^4$ | | R Williams | 4 | 7 | 6 | | | | | | | | |
| Q | D King-Turner | 2 | 3 | | 4 | M Zverev | 6 | 5 | 3 | | | | | | | | |
| 4 | M Zverev | 6 | 6 | | | | | | | | | | | 7 | T Smyczek | 4 | 6$^5$ |
| 6 | B Reynolds | 6 | 6 | | | | | | | | | | | 6 | B Reynolds | 6 | 7$^7$ |
| | T-h Yang | 2 | 2 | | 6 | B Reynolds | 6 | 6 | | | | | | | | | |
| | C Reix | 4 | 3 | | PR | J Witten | 2 | 4 | | | | | | | | | |
| PR | J Witten | 6 | 6 | | | | | | | 6 | B Reynolds | 6 | 6 | | | | |
| | A Kuznetsov | 7 | 6 | | | | | | | | A Kuznetsov | 4 | 3 | | | | |
| WC | Brandon Ficky | 5 | 2 | | | A Kuznetsov | 6 | 6 | | | | | | | | | |
| Q | L Gregorc | 7$^7$ | 5 | | Q | L Gregorc | 4 | 4 | | | | | | | | | |
| 2 | A Bogomolov Jr. | 6$^5$ | 1$^r$ | | | | | | | | | | | | | | |