# 2013 Knoxville Challenger – Singles

Michael Russell was the defending champion, but retired against Tennys Sandgren in the quarterfinals. Top seed Tim Smyczek won the title defeating unseeded Canadian Peter Polansky in the final.

## Seeds

* Tim Smyczek (champion)
* Denis Kudla (first round)
* Jack Sock (first round)
* Michael Russell (quarterfinals, retired)
* Donald Young (second round)
* Ryan Harrison (second round)
* Rajeev Ram (first round)
* Alex Kuznetsov (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 | Semifinals | Final | Final | Final | Final |
| 1 | Tim Smyczek | 7 | 7$^7$ | | | | | |
| | Tennys Sandgren | 5 | 6$^3$ | | | | | |
| | Tennys Sandgren | 5 | 6$^3$ | | 1 | Tim Smyczek | 6 | 6 |
| | | | | | | Peter Polansky | 4 | 2 |
| | Peter Polansky | 4 | 6 | 6 | | Peter Polansky | 4 | 2 |
| Q | Takanyi Garanganga | 6 | 1 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | T Smyczek | 6 | 6 | | | | | | | | | | | | | | |
| LL | F Wolmarans | 4 | 4 | | 1 | T Smyczek | 5 | 7 | 6 | | | | | | | | |
| | S Johnson | 6 | 6 | | | S Johnson | 7 | 5 | 4 | | | | | | | | |
| PR | Laurent Rochette | 3 | 2 | | | | | | | 1 | T Smyczek | 6 | 6 | | | | |
| | S Groth | 6 | 6 | | | | | | | 8 | A Kuznetsov | 4 | 3 | | | | |
| | J-P Smith | 3 | 3 | | | S Groth | 6$^0$ | 6 | 6$^2$ | | | | | | | | |
| | M Neuchrist | 4 | 3 | | 8 | A Kuznetsov | 7$^7$ | 2 | 7$^7$ | | | | | | | | |
| 8 | A Kuznetsov | 6 | 6 | | | | | | | | | | | 1 | T Smyczek | 7 | 7$^7$ |
| 4 | M Russell | 6 | 4 | 6 | | | | | | | | | | | T Sandgren | 5 | 6$^3$ |
| WC | J Jenkins | 3 | 6 | 4 | 4 | M Russell | 6 | 2 | 6 | | | | | | | | |
| Alt | E Corrie | 2 | 6 | 6 | Alt | E Corrie | 4 | 6 | 1 | | | | | | | | |
| | J Hernández | 6 | 2 | 4 | | | | | | 4 | M Russell | 4 | 0$^r$ | | | | |
| | T Sandgren | 6 | 6 | | | | | | | | T Sandgren | 6 | 0 | | | | |
| | D Molchanov | 3 | 3 | | | T Sandgren | 6 | 6 | | | | | | | | | |
| | R Williams | | | | 6 | R Harrison | 4 | 3 | | | | | | | | | |
| 6 | R Harrison | w/o | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | D Young | 6 | 6 | | | | | | | | | | | | | | |
| | S Myneni | 4 | 2 | | 5 | D Young | 0 | 3 | | | | | | | | | |
| | N Langer | 1 | 4 | | Q | S Singh | 6 | 6 | | | | | | | | | |
| Q | S Singh | 6 | 6 | | | | | | Q | S Singh | 3 | 3 | | | | | |
| Alt | D Rice | 6$^4$ | 6 | 7 | | | | | | P Polansky | 6 | 6 | | | | | |
| | A Krajicek | 7$^7$ | 4 | 5 | Alt | D Rice | 4 | 4 | | | | | | | | | |
| | P Polansky | 6 | 7$^7$ | | | P Polansky | 6 | 6 | | | | | | | | | |
| 3/WC | J Sock | 4 | 6$^3$ | | | | | | | | | | | P Polansky | 4 | 6 | 6 |
| 7 | R Ram | 2 | 7$^7$ | 4 | | | | | | | | | Q | T Garanganga | 6 | 1 | 3 |
| Q | K King | 6 | 6$^5$ | 6 | Q | K King | 2 | 4 | | | | | | | | | |
| Q | T Garanganga | 6 | 6 | | Q | T Garanganga | 6 | 6 | | | | | | | | | |
| | T Angelinos | 4 | 2 | | | | | | Q | T Garanganga | 7$^9$ | 7$^7$ | | | | | |
| Q | Mitchell Frank | 6 | 6 | | | | | | | R de Voest | 6$^7$ | 6$^4$ | | | | | |
| WC | Jarryd Chaplin | 4 | 3 | | Q | M Frank | | | | | | | | | | | |
| | R de Voest | 6 | 7$^8$ | | | R de Voest | w/o | | | | | | | | | | |
| 2/Alt | D Kudla | 1 | 6$^6$ | | | | | | | | | | | | | | |