# 2011 HP Open – Singles

Tamarine Tanasugarn was the defending champion, but lost to Angelique Kerber in the quarterfinals.
No.2 seed Marion Bartoli won the 2011 title, defeating No.1 seed and US Open Champion Samantha Stosur 6–3, 6–1.

## Seeds

* Samantha Stosur (final)
* Marion Bartoli (champion)
* Angelique Kerber (semifinals)
* Petra Cetkovská (quarterfinals)
* Jarmila Gajdošová (second round)
* Ayumi Morita (quarterfinals)
* Chanelle Scheepers (quarterfinals)
* Christina McHale (first round)

## Main 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 | Samantha Stosur | 7$^7$ | 3 | 6 | | | | |
| | Zheng Jie | 6$^5$ | 6 | 3 | | | | |
| | Zheng Jie | 6$^5$ | 6 | 3 | 1 | Samantha Stosur | 3 | 1 |
| | | | | | 2/WC | Marion Bartoli | 6 | 6 |
| 3 | Angelique Kerber | 1 | 6$^5$ | | 2/WC | Marion Bartoli | 6 | 6 |
| 2/WC | Marion Bartoli | 6 | 7$^7$ | | | | | |

### 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 | Semifinals |
| 1 | S Stosur | 6 | 3 | 7 | | | | | | | | | | | | | | | |
| Q | N Lertcheewakarn | 3 | 6 | 5 | 1 | S Stosur | 6 | 6 | | | | | | | | | | | |
| | C Vandeweghe | 4 | 4 | | | M Doi | 2 | 4 | | | | | | | | | | | |
| | M Doi | 6 | 6 | | | | | | | 1 | S Stosur | 6 | 6 | | | | | | |
| Q | S Aoyama | 2 | 0 | | | | | | | 7 | C Scheepers | 2 | 3 | | | | | | |
| Q | Y Shvedova | 6 | 6 | | Q | Y Shvedova | 6 | 3 | 6$^5$ | | | | | | | | | | |
| | A Kudryavtseva | 2 | 2 | | 7 | C Scheepers | 4 | 6 | 7$^7$ | | | | | | | | | | |
| 7 | C Scheepers | 6 | 6 | | | | | | | | | | | | 1 | S Stosur | 7$^7$ | 3 | 6 |
| 4 | P Cetkovská | 6 | 7$^7$ | | | | | | | | | | | | | J Zheng | 6$^5$ | 6 | 3 |
| | K Date-Krumm | 2 | 6$^2$ | | 4 | P Cetkovská | 6 | 6 | | | | | | | | | | | |
| | M Minella | 3 | 3 | | Q | E Sema | 0 | 3 | | | | | | | | | | | |
| Q | E Sema | 6 | 6 | | | | | | | 4 | P Cetkovská | 6 | 5 | 3 | | | | | |
| | Z Kučová | 1 | 1 | | | | | | | | J Zheng | 0 | 7 | 6 | | | | | |
| | J Zheng | 6 | 6 | | | J Zheng | 7 | 6 | | | | | | | | | | | |
| WC | A Nakamura | 0 | 1 | | 5 | J Gajdošová | 5 | 3 | | | | | | | | | | | |
| 5 | J Gajdošová | 6 | 6 | | | | | | | | | | | | | | | | |

### 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 |
| 8 | C McHale | 3 | 5 | | | | | | | | | | | | | |
| | T Tanasugarn | 6 | 7 | | | T Tanasugarn | 6 | 6 | | | | | | | | |
| | M Johansson | 6 | 6 | | | M Johansson | 2 | 4 | | | | | | | | |
| | I Falconi | 3 | 2 | | | | | | | T Tanasugarn | 3 | 4 | | | | |
| | Y-J Chan | 1 | 6 | 4 | | | | | 3 | A Kerber | 6 | 6 | | | | |
| | O Govortsova | 6 | 2 | 6 | | O Govortsova | 1 | 3 | | | | | | | | |
| WC | K Nara | 2 | 1 | | 3 | A Kerber | 6 | 6 | | | | | | | | |
| 3 | A Kerber | 6 | 6 | | | | | | | | | | 3 | A Kerber | 1 | 6$^5$ |
| 6 | A Morita | 7$^7$ | 6 | | | | | | | | | | 2/WC | M Bartoli | 6 | 7$^7$ |
| | S Zhang | 6$^3$ | 2 | | 6 | A Morita | 6 | 6 | | | | | | | | |
| | E Daniilidou | 6 | 6 | | | E Daniilidou | 2 | 3 | | | | | | | | |
| | A Pivovarova | 2 | 2 | | | | | | 6 | A Morita | 2 | 1 | | | | |
| | J Craybas | 1 | 6 | 1 | | | | | 2/WC | M Bartoli | 6 | 6 | | | | |
| | V King | 6 | 3 | 6 | | V King | 1 | 2 | | | | | | | | |
| | M Czink | 2 | 2 | | 2/WC | M Bartoli | 6 | 6 | | | | | | | | |
| 2/WC | M Bartoli | 6 | 6 | | | | | | | | | | | | | |