# 2011 BWF World Championships – Women's singles

The women's singles tournament of the 2011 BWF World Championships (World Badminton Championships) was held from August 8 to 14. Wang Lin was the defending champion. Wang Yihan won the final against Cheng Shao-Chieh 21–15, 21–10.

## Seeds

* Wang Shixian (quarterfinals)
* Wang Yihan (champion)
* Wang Xin (semifinals)
* Jiang Yanjiao (third round)
* Tine Baun (quarterfinals)
* Saina Nehwal (quarterfinals)
* Cheng Shao-Chieh (final)
* Bae Youn-joo (second round)
* Juliane Schenk (semifinals)
* Porntip Buranaprasertsuk (third round)
* Ratchanok Intanon (third round)
* Petya Nedelcheva (third round)
* Sung Ji-hyun (third round)
* Yip Pui Yin (third round, retired)
* Eriko Hirose (second round)
* Sayaka Sato (third round)

## Draw
### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Wang Shixian | 16 | 17 | | | | | | | | |
| 7 | Cheng Shao-chieh | 21 | 21 | | | | | | | | |
| 7 | Cheng Shao-chieh | 21 | 21 | 7 | Cheng Shao-chieh | 21 | 21 | | | | |
| | | | | 9 | Juliane Schenk | 18 | 6 | | | | |
| 9 | Juliane Schenk | 21 | 21 | 9 | Juliane Schenk | 18 | 6 | | | | |
| 5 | Tine Baun | 9 | 11 | | | | | | | | |
| 5 | Tine Baun | 9 | 11 | | | | | 7 | Cheng Shao-chieh | 15 | 10 |
| | | | | | | | | 2 | Wang Yihan | 21 | 21 |
| 6 | Saina Nehwal | 15 | 10 | | | | | | | | | 2 | Wang Yihan | 21 | 21 |
| 3 | Wang Xin | 21 | 21 | | | | | | | | |
| 3 | Wang Xin | 21 | 21 | 3 | Wang Xin | 14 | 15 | | | | |
| | | | | 2 | Wang Yihan | 21 | 21 | | | | |
| | Pi Hongyan | 14 | 16 | 2 | Wang Yihan | 21 | 21 | | | | |
| 2 | Wang Yihan | 21 | 21 | | | | | | | | |

### Section 1

| First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Second Round | Third Round | Third Round | Third Round | Third Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 1 | Wang SX | 21 | 21 | | | | | | | | | |
| L Zetchiri | 21 | 21 | | | L Zetchiri | 11 | 14 | | | | | | | | | |
| R Rochdy | 7 | 12 | | | | | | | 1 | Wang SX | 21 | 21 | | | | |
| | | | | | | | | | 10 | P Buranaprasertsuk | 7 | 11 | | | | |
| | | | | 10 | P Buranaprasertsuk | 21 | 21 | | | | | | | | | |
| M Chan | 21 | 13 | 11 | | E Cann | 12 | 19 | | | | | | | | | |
| E Cann | 16 | 21 | 21 | | | | | | | | | | 1 | Wang SX | 16 | 17 |
| | | | | | | | | | | | | | 7 | Cheng S-c | 21 | 21 |
| | | | | 7 | Cheng S-c | 21 | 21 | | | | | | | | | |
| C Reid | 9 | 19 | | | L Tan | 15 | 11 | | | | | | | | | |
| L Tan | 21 | 21 | | | | | | | 7 | Cheng S-c | 21 | 21 | | | | |
| | | | | | | | | | | C Marín | 18 | 17 | | | | |
| | | | | 15 | E Hirose | 23 | 16 | 16 | | | | | | | | |
| Yao J | 18 | 21 | | | C Marín | 21 | 21 | 21 | | | | | | | | |
| C Marín | 21 | 23 | | | | | | | | | | | | | | |

### Section 2

| First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Second Round | Third Round | Third Round | Third Round | Third Round | Third Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 4 | Jiang YJ | 21 | 21 | | | | | | | | | | |
| Fu MT | 21 | 21 | | | Fu MT | 13 | 17 | | | | | | | | | | |
| L Griga | 10 | 10 | | | | | | | 4 | Jiang YJ | 14 | 21 | 17 | | | | |
| | | | | | | | | | 9 | J Schenk | 21 | 7 | 21 | | | | |
| | | | | 9 | J Schenk | 22 | 18 | 21 | | | | | | | | | |
| L Fanetri | 21 | 21 | | | L Fanetri | 20 | 21 | 11 | | | | | | | | | |
| T Bibik | 11 | 9 | | | | | | | | | | | | 9 | J Schenk | 21 | 21 |
| | | | | | | | | | | | | | | 5 | T Baun | 9 | 11 |
| | | | | 5 | T Baun | 26 | 21 | | | | | | | | | | |
| J Cicognini | 22 | 19 | 13 | | Chan TK | 24 | 7 | | | | | | | | | | |
| Chan TK | 20 | 21 | 21 | | | | | | 5 | T Baun | 13 | 21 | 21 | | | | |
| | | | | | | | | | 13 | Sung J-h | 21 | 12 | 10 | | | | |
| | | | | 13 | Sung J-h | 21 | 21 | | | | | | | | | | |
| M Tvrdy | 11 | 13 | | | A Goto | 13 | 14 | | | | | | | | | | |
| A Goto | 21 | 21 | | | | | | | | | | | | | | | |

### Section 3

| First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Second Round | Third Round | Third Round | Third Round | Third Round | Third Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| S Egelstaff | 20 | 16 | | | | | | | | | | | | | | | |
| M Li | 22 | 21 | | | M Li | 21 | 21 | 17 | | | | | | | | | |
| | | | | 14 | Yip PY | 23 | 17 | 21 | | | | | | | | | |
| | | | | | | | | | 14 | Yip PY | 3 | 5 | r | | | | |
| A Firdasari | 21 | 22 | 13 | | | | | | 6 | S Nehwal | 21 | 13 | | | | | |
| C Magee | 13 | 24 | 21 | | C Magee | 10 | 7 | | | | | | | | | | |
| | | | | 6 | S Nehwal | 21 | 21 | | | | | | | | | | |
| | | | | | | | | | | | | | | 6 | S Nehwal | 15 | 10 |
| R Wang | 17 | 17 | | | | | | | | | | | | 3 | Wang X | 21 | 21 |
| A Allegrini | 21 | 21 | | | A Allegrini | 11 | 12 | | | | | | | | | | |
| | | | | 12 | P Nedelcheva | 21 | 21 | | | | | | | | | | |
| | | | | | | | | | 12 | P Nedelcheva | 21 | 13 | 5 | | | | |
| K Gavnholt | 16 | 15 | | | | | | | 3 | Wang X | 16 | 21 | 21 | | | | |
| A Prokopenko | 21 | 21 | | | A Prokopenko | 15 | 13 | | | | | | | | | | |
| | | | | 3 | Wang X | 21 | 21 | | | | | | | | | | |

### Section 4

| First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Second Round | Third Round | Third Round | Third Round | Third Round | Third Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| Tai T-y | wo | | | | | | | | | | | | | | | |
| O Konon | | | | O Konon | 20 | 11 | | | | | | | | | | |
| | | | 16 | S Sato | 22 | 21 | | | | | | | | | | |
| | | | | | | | | 16 | S Sato | 18 | 14 | | | | | |
| Pi HY | 21 | 21 | | | | | | | Pi HY | 21 | 21 | | | | | |
| S Walker | 12 | 8 | | Pi HY | 21 | 15 | 21 | | | | | | | | | |
| | | | 8 | Bae Y-j | 9 | 21 | 13 | | | | | | | | | |
| | | | | | | | | | | | | | | Pi HY | 14 | 16 |
| S Prutsch | 10 | 18 | | | | | | | | | | | 2 | Wang YH | 21 | 21 |
| J Meulendijks | 21 | 21 | | J Meulendijks | 18 | 21 | 14 | | | | | | | | | |
| | | | 11 | R Intanon | 21 | 11 | 21 | | | | | | | | | |
| | | | | | | | | 11 | R Intanon | 21 | 12 | 9 | | | | |
| Gu J | 21 | 21 | | | | | | 2 | Wang YH | 13 | 21 | 21 | | | | |
| S Ponsana | 19 | 17 | | Gu J | 13 | 18 | | | | | | | | | | |
| | | | 2 | Wang YH | 21 | 21 | | | | | | | | | | |