# 2011 Atlanta Tennis Championships – Singles

Mardy Fish was the defending champion, and in a repeat of the previous year's final, he successfully defended his title by defeating his compatriot John Isner after dropping the opening set. This time the score was 3–6, 7–6$^{(8–6)}$, 6–2.

## Seeds

The top four seeds received a bye into the second round.
* Mardy Fish (champion)
* Kevin Anderson (quarterfinals)
* John Isner (final)
* Xavier Malisse (second round)
* Grigor Dimitrov (first round)
* Igor Kunitsyn (first round)
* Alex Bogomolov Jr. (first round)
* Somdev Devvarman (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 | Final |
| 1 | Mardy Fish | 6 | 6 | | | | | | |
| | Ryan Harrison | 2 | 4 | | | | | | |
| | Ryan Harrison | 2 | 4 | | 1 | Mardy Fish | 3 | 7$^8$ | 6 |
| | | | | | 3 | John Isner | 6 | 6$^6$ | 2 |
| 3 | John Isner | 7 | 6$^3$ | 6 | 3 | John Isner | 6 | 6$^6$ | 2 |
| | Gilles Müller | 5 | 7$^7$ | 1 | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | M Fish | 6 | 6 | | | | | | | | | | |
| | R Berankis | 6$^5$ | 2 | | | N Mahut | 3 | 3 | | | | | | | | | | |
| | N Mahut | 7$^7$ | 6 | | | | | | | 1 | M Fish | 6 | 6 | | | | | |
| | M Berrer | 6$^6$ | 4 | | | | | | | 8 | S Devvarman | 4 | 3 | | | | | |
| | T Ito | 7$^8$ | 6 | | | T Ito | 1 | 3 | | | | | | | | | | |
| | R Sweeting | 4 | 6 | 4 | 8 | S Devvarman | 6 | 6 | | | | | | | | | | |
| 8 | S Devvarman | 6 | 3 | 6 | | | | | | | | | | | 1 | M Fish | 6 | 6 |
| | | | | | | | | | | | | | | | | R Harrison | 2 | 4 |
| | | | | | 4 | X Malisse | 7$^7$ | 4 | 4 | | | | | | | | | |
| Q | Y Sugita | 1 | 6$^5$ | | | R Harrison | 6$^3$ | 6 | 6 | | | | | | | | | |
| | R Harrison | 6 | 7$^7$ | | | | | | | | R Harrison | 4 | 6 | 7$^7$ | | | | |
| | L Hewitt | 6 | 6 | | | | | | | Q | R Ram | 6 | 1 | 6$^5$ | | | | |
| Q | P Simmonds | 4 | 4 | | | L Hewitt | 5 | 6 | 2 | | | | | | | | | |
| Q | R Ram | 6 | 6 | | Q | R Ram | 7 | 2 | 6 | | | | | | | | | |
| 5 | G Dimitrov | 4 | 4 | | | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | I Kunitsyn | 7$^7$ | 2 | 5 | | | | | | | | | | | | | | |
| Q | M Matosevic | 6$^3$ | 6 | 7 | Q | M Matosevic | 6 | 1 | 2 | | | | | | | | | |
| | Y-h Lu | 7 | 7$^7$ | | | Y-h Lu | 3 | 6 | 6 | | | | | | | | | |
| | M Bachinger | 5 | 6$^4$ | | | | | | | | Y-h Lu | 1 | 2 | | | | | |
| | J Blake | 5 | 7$^7$ | 6 | | | | | | 3 | J Isner | 6 | 6 | | | | | |
| | E Gulbis | 7 | 6$^5$ | 2 | | J Blake | 6$^8$ | 7$^7$ | 5 | | | | | | | | | |
| | | | | | 3 | J Isner | 7$^{10}$ | 6$^3$ | 7 | | | | | | | | | |
| | | | | | | | | | | | | | | 3 | J Isner | 7 | 6$^3$ | 6 |
| 7 | A Bogomolov Jr. | 3 | 6$^6$ | | | | | | | | | | | | G Müller | 5 | 7$^7$ | 1 |
| | G Müller | 6 | 7$^8$ | | | G Müller | 7$^8$ | 2 | 6 | | | | | | | | | |
| WC | T Haas | 4 | 5 | | WC | R Ginepri | 6$^6$ | 6 | 2 | | | | | | | | | |
| WC | R Ginepri | 6 | 7 | | | | | | | | G Müller | 7$^7$ | 7$^7$ | | | | | |
| WC | D Young | 0 | 3 | | | | | | | 2 | K Anderson | 6$^3$ | 6$^3$ | | | | | |
| | M Russell | 6 | 6 | | | M Russell | 1 | 5 | | | | | | | | | | |
| | | | | | 2 | K Anderson | 6 | 7 | | | | | | | | | | |