# 2011 Delray Beach International Tennis Championships – Singles

Ernests Gulbis was the defending champion but decided to participate in the 2011 Dubai Tennis Championships instead. Juan Martín del Potro won this tournament, by defeating Janko Tipsarević 6–4, 6–4 in the final.

## Seeds

* Andy Roddick (withdrew due to flu)
* Mardy Fish (semifinals)
* Sam Querrey (second round)
* John Isner (first round)
* Kevin Anderson (quarterfinals)
* Janko Tipsarević (final)
* Benjamin Becker (first round)
* Adrian Mannarino (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 | Janko Tipsarević | 6 | 6 | | | | |
| | Kei Nishikori | 4 | 4 | | | | |
| | Kei Nishikori | 4 | 4 | 6 | Janko Tipsarević | 4 | 4 |
| | | | | SE | Juan Martín del Potro | 6 | 6 |
| SE | Juan Martín del Potro | 6 | 7 | SE | Juan Martín del Potro | 6 | 6 |
| 2 | Mardy Fish | 1 | 5 | | | | |

### 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 |
| Q | M Matosevic | 6 | 1 | 2 | | | | | | | | | | | | | | |
| | D Sela | 3 | 6 | 6 | | D Sela | 6 | 3 | 2 | | | | | | | | | |
| LL | I Kunitsyn | 4 | 6 | 3 | | I Dodig | 2 | 6 | 6 | | | | | | | | | |
| | I Dodig | 6 | 2 | 6 | | | | | | | I Dodig | 6$^0$ | 1 | | | | | |
| LL | R Farah | 1 | 4 | | | | | | | 6 | J Tipsarević | 7 | 6 | | | | | |
| Q | B Kavčič | 6 | 6 | | Q | B Kavčič | 2 | 7 | 3 | | | | | | | | | |
| | I Karlović | 6$^{14}$ | 6$^1$ | | 6 | J Tipsarević | 6 | 6$^8$ | 6 | | | | | | | | | |
| 6 | J Tipsarević | 7 | 7 | | | | | | | | | | | | 6 | J Tipsarević | 6 | 6 |
| 3/WC | S Querrey | 6 | 5 | 6 | | | | | | | | | | | | K Nishikori | 4 | 4 |
| | D Brown | 3 | 7 | 3 | 3/WC | S Querrey | 6$^5$ | 4 | | | | | | | | | | |
| Q | R Sweeting | 6 | 6 | | Q | R Sweeting | 7 | 6 | | | | | | | | | | |
| | I Andreev | 2 | 3 | | | | | | | Q | R Sweeting | 7 | 2 | 4 | | | | |
| | B Dabul | 2 | 6$^5$ | | | | | | | | K Nishikori | 6$^5$ | 6 | 6 | | | | |
| | K Nishikori | 6 | 7 | | | K Nishikori | 6 | 6 | | | | | | | | | | |
| WC | J Blake | 7 | 6 | | WC | J Blake | 3 | 4 | | | | | | | | | | |
| 7 | B Becker | 5 | 4 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | K Anderson | 6$^5$ | 7 | 6 | | | | | | | | | | | | |
| LL | D Young | 7 | 6$^4$ | 2 | 5 | K Anderson | 6 | 6 | | | | | | | | |
| | F Serra | 3 | 6 | 7 | | F Serra | 1 | 4 | | | | | | | | |
| WC | R Harrison | 6 | 3 | 5 | | | | | 5 | K Anderson | 4 | 4 | | | | |
| | R Berankis | 4 | 1 | | | | | | SE | JM del Potro | 6 | 6 | | | | |
| SE | JM del Potro | 6 | 6 | | SE | JM del Potro | 6 | 6 | | | | | | | | |
| | T Gabashvili | 6 | 5 | 7 | | T Gabashvili | 1 | 1 | | | | | | | | |
| 4 | J Isner | 4 | 7 | 6$^{13}$ | | | | | | | | | SE | JM del Potro | 6 | 7 |
| 8 | A Mannarino | 1 | 7 | 6 | | | | | | | | | 2 | M Fish | 1 | 5 |
| | L Mayer | 6 | 6$^3$ | 4 | 8 | A Mannarino | 3 | 2 | | | | | | | | |
| Q | A Falla | 6 | 2 | | Q | A Falla | 6 | 6 | | | | | | | | |
| LL | J Hájek | 1 | 0 | r | | | | | Q | A Falla | 1 | 4 | | | | |
| | R Mello | 2 | 6 | 6 | | | | | 2 | M Fish | 6 | 6 | | | | |
| | R Schüttler | 6 | 2 | 3 | | R Mello | 2 | 1 | | | | | | | | |
| | B Phau | 0 | r | | 2 | M Fish | 6 | 6 | | | | | | | | |
| 2 | M Fish | 5 | | | | | | | | | | | | | | |