# 2011 Comerica Bank Challenger – Singles

Marinko Matosevic, the defending champion, didn't participate this year.
Laurynas Grigelis won the title, defeating Ilija Bozoljac 6–2, 7–6$^{(7–4)}$ in the final.

## Seeds

* Igor Kunitsyn (semifinals)
* Donald Young (first round)
* Matthew Ebden (quarterfinals)
* Wayne Odesnik (quarterfinals)
* Chris Guccione (first round)
* Carsten Ball (semifinals)
* Ilija Bozoljac (final)
* Amer Delić (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 |
| 1 | Igor Kunitsyn | 4 | 6 | 6$^8$ | | | | |
| | Laurynas Grigelis | 6 | 2 | 7$^{10}$ | | | | |
| | Laurynas Grigelis | 6 | 2 | 7$^{10}$ | | Laurynas Grigelis | 6 | 7$^7$ |
| | | | | | 7 | Ilija Bozoljac | 2 | 6$^4$ |
| 6 | Carsten Ball | 6$^3$ | 3 | | 7 | Ilija Bozoljac | 2 | 6$^4$ |
| 7 | Ilija Bozoljac | 7$^7$ | 6 | | | | | |

### Top half

| 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 | I Kunitsyn | 6 | 1 | | | | | | | | | | | | | | | |
| | K-t Im | 3 | 0$^r$ | 1 | I Kunitsyn | 7 | 6 | | | | | | | | | | | |
| Q | Alexander Domijan | 6 | 6 | Q | A Domijan | 5 | 3 | | | | | | | | | | | |
| | T Matsui | 3 | 4 | | | | | | 1 | I Kunitsyn | 6 | 6 | | | | | | |
| | Greg Ouellette | 1 | 4 | | | | | | | M Venus | 3 | 4 | | | | | | |
| | R Klaasen | 6 | 6 | | R Klaasen | 4 | 4 | | | | | | | | | | | |
| | M Venus | 7$^9$ | 6 | | M Venus | 6 | 6 | | | | | | | | | | | |
| 5 | C Guccione | 6$^7$ | 3 | | | | | | | | | | | 1 | I Kunitsyn | 4 | 6 | 6$^8$ |
| 3 | M Ebden | 7 | 6 | | | | | | | | | | | | L Grigelis | 6 | 2 | 7$^{10}$ |
| | N Monroe | 6$^4$ | 4 | 3 | M Ebden | 4 | 6 | 6 | | | | | | | | | | |
| Q | Andre Dome | 2 | 6$^5$ | WC | J Sock | 6 | 3 | 4 | | | | | | | | | | |
| WC | J Sock | 6 | 7 | | | | | | 3 | M Ebden | 6 | 6$^5$ | 2 | | | | | |
| | L Grigelis | 6 | 6 | | | | | | | L Grigelis | 3 | 7$^7$ | 6 | | | | | |
| | D Yoo | 2 | 3 | | L Grigelis | 6 | 6 | | | | | | | | | | | |
| LL | J Wang | 6 | 6 | LL | J Wang | 2 | 4 | | | | | | | | | | | |
| 8 | A Delić | 3 | 3 | | | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | C Ball | 6 | 5 | 6 | | | | | | | | | | | | | | |
| Alt | P-L Duclos | 4 | 7 | 4 | 6 | C Ball | 4 | 7 | 7$^7$ | | | | | | | | | |
| | Robby Ginepri | 2 | 4 | | LL | R Williams | 6 | 5 | 6$^6$ | | | | | | | | | |
| LL | R Williams | 6 | 6 | | | | | | | 6 | C Ball | 4 | 7$^7$ | 6 | | | | |
| Q | P Simmonds | 6$^4$ | 6 | 0 | | | | | | 4 | W Odesnik | 6 | 6$^5$ | 4 | | | | |
| | K Kim | 7 | 3 | 6 | | K Kim | 0 | 6 | 1 | | | | | | | | | |
| | H Kondo | 1 | 4 | | 4 | W Odesnik | 6 | 4 | 6 | | | | | | | | | |
| 4 | W Odesnik | 6 | 6 | | | | | | | | | | | | 6 | C Ball | 6$^3$ | 3 |
| 7 | I Bozoljac | 6 | 6 | | | | | | | | | | | | 7 | I Bozoljac | 7$^7$ | 6 |
| WC | S Johnson | 3 | 3 | | 7 | I Bozoljac | 2 | 6 | 7$^7$ | | | | | | | | | |
| | A Sitak | 3 | 6$^2$ | | | J Baker | 6 | 1 | 6$^4$ | | | | | | | | | |
| | J Baker | 6 | 7$^7$ | | | | | | | 7 | I Bozoljac | 7$^8$ | 6$^8$ | 6 | | | | |
| WC | B Klahn | 6 | 5 | 3 | | | | | | | A Bogdanovic | 6$^6$ | 7$^{10}$ | 3 | | | | |
| Q | D Martin | 4 | 7 | 6 | Q | D Martin | 1 | 2 | | | | | | | | | | |
| | A Bogdanovic | 7 | 6 | | | A Bogdanovic | 6 | 6 | | | | | | | | | | |
| 2 | D Young | 6$^2$ | 2 | | | | | | | | | | | | | | | |