# 2011 Honolulu Challenger – Singles

Michael Russell was the defending champion, but lost to Ryan Harrison in the semifinals. Harrison went on to win the title after defeating Alex Kuznetsov 6–4, 3–6, 6–4 in the final.

## Seeds

* Michael Russell (semifinals)
* Robert Kendrick (quarterfinals)
* Ryan Sweeting (quarterfinals)
* Grega Žemlja (first round)
* Bobby Reynolds (quarterfinals)
* Ryan Harrison (champion)
* Tim Smyczek (second round)
* Jesse Witten (semifinals)

## 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 | Final |
| 1 | Michael Russell | 6 | 3 | 3 | | | | | |
| 6 | Ryan Harrison | 2 | 6 | 6 | | | | | |
| 6 | Ryan Harrison | 2 | 6 | 6 | 6 | Ryan Harrison | 6 | 3 | 6 |
| | | | | | | Alex Kuznetsov | 4 | 6 | 4 |
| | Alex Kuznetsov | 4 | 6 | 6 | | Alex Kuznetsov | 4 | 6 | 4 |
| 8 | Jesse Witten | 6 | 1 | 4 | | | | | |

### 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 | Semifinals |
| 1 | M Russell | 4 | 6 | 6 | | | | | | | | | | | | | | |
| Q | W-s Jun | 6 | 1 | 4 | 1 | M Russell | 6 | 6 | | | | | | | | | | |
| | K Kim | 2 | 6$^2$ | | | N Monroe | 0 | 2 | | | | | | | | | | |
| | N Monroe | 6 | 7$^7$ | | | | | | | 1 | M Russell | 6 | 7$^7$ | | | | | |
| | V Pospisil | 6 | 6 | | | | | | | | V Pospisil | 4 | 6$^3$ | | | | | |
| Alt | G Ouellette | 1 | 3 | | | V Pospisil | 6 | 6 | | | | | | | | | | |
| Q | L Gregorc | 3 | 2 | | 7 | T Smyczek | 1 | 2 | | | | | | | | | | |
| 7 | T Smyczek | 6 | 6 | | | | | | | | | | | 1 | M Russell | 6 | 3 | 3 |
| 3 | R Sweeting | 7$^7$ | 6 | | | | | | | | | | | 6 | R Harrison | 2 | 6 | 6 |
| Q | O Sajous | 6$^2$ | 0 | | 3 | R Sweeting | 6 | 5 | 7 | | | | | | | | | |
| WC | D Britton | 4 | 4 | | | G Jones | 4 | 7 | 5 | | | | | | | | | |
| | G Jones | 6 | 6 | | | | | | | 3 | R Sweeting | 6$^4$ | 4 | | | | | |
| | R DeHeart | 6 | 7 | | | | | | | 6 | R Harrison | 7$^7$ | 6 | | | | | |
| WC | Jérémy Tweedt | 3 | 5 | | | R DeHeart | 3 | 0 | | | | | | | | | | |
| Q | T Chen | 1 | 2 | | 6 | R Harrison | 6 | 6 | | | | | | | | | | |
| 6 | R Harrison | 6 | 6 | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 5 | B Reynolds | 3 | 6 | 6 | | | | | | | | | | | | | | | |
| | S Groth | 6 | 3 | 3 | 5 | B Reynolds | 6 | 6 | | | | | | | | | | | |
| WC | A Krajicek | 6 | 6 | | WC | A Krajicek | 4 | 2 | | | | | | | | | | | |
| | M Venus | 4 | 1 | | | | | | | 5 | B Reynolds | 3 | 6 | 6$^4$ | | | | | |
| | A Kuznetsov | 7$^7$ | 7$^7$ | | | | | | | | A Kuznetsov | 6 | 2 | 7$^7$ | | | | | |
| | M McClune | 6$^2$ | 6$^3$ | | | A Kuznetsov | 4 | 6 | 6 | | | | | | | | | | |
| | P Bester | 7 | 6 | | | P Bester | 6 | 4 | 4 | | | | | | | | | | |
| 4 | G Žemlja | 5 | 1 | | | | | | | | | | | | | A Kuznetsov | 4 | 6 | 6 |
| 8 | J Witten | 6 | 6 | | | | | | | | | | | | 8 | J Witten | 6 | 1 | 4 |
| | D Yoo | 3 | 2 | | 8 | J Witten | 5 | 6 | 7$^7$ | | | | | | | | | | |
| | Pablo Martín-Adalia | 4 | 4 | | WC | D Lajola | 7 | 4 | 6$^5$ | | | | | | | | | | |
| WC | D Lajola | 6 | 6 | | | | | | | 8 | J Witten | 7 | 3 | 6 | | | | | |
| | R Borvanov | 6 | 6 | | | | | | | 2 | R Kendrick | 5 | 6 | 2 | | | | | |
| | M Reid | 3 | 2 | | | R Borvanov | 4 | 4 | | | | | | | | | | | |
| | H Kondo | 1 | 0 | | 2 | R Kendrick | 6 | 6 | | | | | | | | | | | |
| 2 | R Kendrick | 6 | 6 | | | | | | | | | | | | | | | | |