# 2011 U.S. Men's Clay Court Championships – Singles

Juan Ignacio Chela was the defending champion, but could not defend his title since he withdrew from the tournament for personal reasons. In the final match, Ryan Sweeting claimed the title, defeating Kei Nishikori 6–4, 7–6$^{(7–3)}$.

## Seeds

The top four seeds received a bye into the second round.
* Mardy Fish (quarterfinals)
* Sam Querrey (second round)
* Guillermo García López (quarterfinals)
* John Isner (quarterfinals)
* Benjamin Becker (first round)
* Kei Nishikori (final)
* Pablo Cuevas (semifinals)
* Grigor Dimitrov (second 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 | Final | Final | Final | Final |
| 6 | Kei Nishikori | 6 | 7 | | | | |
| 7 | Pablo Cuevas | 3 | 5 | | | | |
| 7 | Pablo Cuevas | 3 | 5 | 6 | Kei Nishikori | 4 | 6$^3$ |
| | | | | WC | Ryan Sweeting | 6 | 7$^7$ |
| Q | Ivo Karlović | 6$^3$ | 3 | WC | Ryan Sweeting | 6 | 7$^7$ |
| WC | Ryan Sweeting | 7$^7$ | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | M Fish | 6 | 6 | | | | | | | | | |
| | A Ramos | 6 | 7 | | | A Ramos | 3 | 4 | | | | | | | | | |
| | B Dabul | 4 | 5 | | | | | | 1 | M Fish | 3 | 2 | | | | | |
| | I Andreev | 6 | 6 | | | | | | 6 | K Nishikori | 6 | 6 | | | | | |
| | M Russell | 2 | 3 | | | I Andreev | 3 | 3 | | | | | | | | | |
| Q | F Škugor | 3 | 2 | | 6 | K Nishikori | 6 | 6 | | | | | | | | | |
| 6 | K Nishikori | 6 | 6 | | | | | | | | | | | 6 | K Nishikori | 6 | 7 |
| | | | | | | | | | | | | | | 7 | P Cuevas | 3 | 5 |
| | | | | | 3 | G García López | 6 | 6 | | | | | | | | | |
| | R Kendrick | 2 | 1 | | | S Devvarman | 4 | 1 | | | | | | | | | |
| | S Devvarman | 6 | 6 | | | | | | 3 | G García López | 6 | 6$^4$ | 3 | | | | |
| WC | J Blake | 6$^3$ | 6 | 6 | | | | | 7 | P Cuevas | 1 | 7$^7$ | 6 | | | | |
| | C Berlocq | 7$^7$ | 3 | 4 | WC | J Blake | 5 | 1 | | | | | | | | | |
| | R Mello | 2 | 0 | | 7 | P Cuevas | 7 | 6 | | | | | | | | | |
| 7 | P Cuevas | 6 | 6 | | | | | | | | | | | | | | |

### Bottom 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 |
| 5 | B Becker | 6$^5$ | 4 | | | | | | | | | | | | | | |
| Q | I Karlović | 7$^7$ | 6 | Q | I Karlović | 6 | 6 | | | | | | | | | | |
| | M Zverev | 6$^1$ | 2 | | I Kunitsyn | 4 | 1 | | | | | | | | | | |
| | I Kunitsyn | 7$^7$ | 6 | | | | | | Q | I Karlović | 7$^7$ | 6$^2$ | 7$^{11}$ | | | | |
| WC | R Harrison | 4 | 3 | | | | | | 4 | J Isner | 6$^2$ | 7$^7$ | 6$^9$ | | | | |
| | H Zeballos | 6 | 6 | | H Zeballos | 5 | 3 | | | | | | | | | | |
| | | | | 4 | J Isner | 7 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | Q | I Karlović | 6$^3$ | 3 |
| 8 | G Dimitrov | 6 | 6 | | | | | | | | | | | WC | R Sweeting | 7$^7$ | 6 |
| | R Schüttler | 0 | 2 | 8 | G Dimitrov | 6$^4$ | 3 | | | | | | | | | | |
| | T Gabashvili | 6 | 7$^7$ | | T Gabashvili | 7$^7$ | 6 | | | | | | | | | | |
| Q | P Capdeville | 4 | 6$^4$ | | | | | | | T Gabashvili | 6 | 3 | 1 | | | | |
| Q | T Smyczek | 2 | 2 | | | | | | WC | R Sweeting | 3 | 6 | 6 | | | | |
| WC | R Sweeting | 6 | 6 | WC | R Sweeting | 3 | 7$^7$ | 6 | | | | | | | | | |
| | | | | 2 | S Querrey | 6 | 6$^5$ | 3 | | | | | | | | | |