| 2013 Comerica Bank Challenger | |
|---|---|
| Date | 5–11 August |
| Edition | 26th |
| Location | Aptos, California, United States |
| Champions | |
| Singles | |
 Bradley Klahn | |
| Doubles | |
 Jonathan Erlich / Andy Ram | |
The 2013 Comerica Bank Challenger was a professional tennis tournament played on hard courts. It was the 26th edition of the tournament which was part of the 2013 ATP Challenger Tour. It took place in Aptos, California, United States between 5 and 11 August July 2013.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 ARG | Guido Pella | 76 | 1 |
 RUS | Evgeny Donskoy | 84 | 2 |
| USA | Steve Johnson | 101 | 3 |
| USA | Ryan Harrison | 107 | 4 |
| USA | Wayne Odesnik | 123 | 5 |
| USA | Bobby Reynolds | 138 | 6 |
 GER | Mischa Zverev | 140 | 7 |
| USA | Jimmy Wang | 144 | 8 |
The following players received wildcards into the singles main draw:
Andre Dome Mitchell Krueger Dennis Novikov Tennys Sandgren The following players got into the singles main draw via Special Exempt:
The following players received entry from the qualifying draw:
The following players got into the singles main draw via Lucky Loser:
Bradley Klahn def. 
Dan Evans 3–6, 7–6(7–5), 6–4 Jonathan Erlich / Andy Ram def. 
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