2013 Knoxville Challenger – Singles
| Singles | |
|---|---|
| 2013 Knoxville Challenger | |
| Champion |
 Tim Smyczek
|
| Runner-up |
 Peter Polansky
|
| Final score | 6–4, 6–2 |
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.
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