# 2011 BWF World Championships – Men's singles

The men's singles tournament of the 2011 BWF World Championships (World Badminton Championships) was held from August 8 to 14. Chen Jin was the defending champion. Lin Dan defeated Lee Chong Wei 20–22, 21–14, 23–21 in the final.

## Seeds

* Lee Chong Wei (final)
* Lin Dan (champion)
* Peter Gade (semifinals)
* Taufik Hidayat (second round)
* Chen Long (first round)
* Chen Jin (semifinals)
* Nguyễn Tiến Minh (quarterfinals)
* Du Pengyu (third round)
* Park Sung-hwan (third round)
* Boonsak Ponsana (third round)
* Sho Sasaki (quarterfinals)
* Lee Hyun-il (third round)
* Simon Santoso (third round)
* Marc Zwiebler (second round)
* Kenichi Tago (first round)
* Hu Yun (first round)

## Draw
### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Lee Chong Wei | 21 | 21 | | | | | | | | | | | |
| | Kevin Cordón | 7 | 13 | | | | | | | | | | | |
| | Kevin Cordón | 7 | 13 | | 1 | Lee Chong Wei | 21 | 21 | | | | | | |
| | | | | | 6 | Chen Jin | 13 | 9 | | | | | | |
| | Hans-Kristian Vittinghus | 17 | 13 | | 6 | Chen Jin | 13 | 9 | | | | | | |
| 6 | Chen Jin | 21 | 21 | | | | | | | | | | | |
| 6 | Chen Jin | 21 | 21 | | | | | | | 1 | Lee Chong Wei | 22 | 14 | 21 |
| | | | | | | | | | | 2 | Lin Dan | 20 | 21 | 23 |
| 7 | Nguyễn Tiến Minh | 21 | 19 | 13 | | | | | | | | | | | 2 | Lin Dan | 20 | 21 | 23 |
| 3 | Peter Gade | 17 | 21 | 21 | | | | | | | | | | |
| 3 | Peter Gade | 17 | 21 | 21 | 3 | Peter Gade | 24 | 7 | 15 | | | | | |
| | | | | | 2 | Lin Dan | 22 | 21 | 21 | | | | | |
| 11 | Sho Sasaki | 14 | 16 | | 2 | Lin Dan | 22 | 21 | 21 | | | | | |
| 2 | Lin Dan | 21 | 21 | | | | | | | | | | | |

### Section 1

| First Round | 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 |
| 1 | Lee CW | 21 | 21 | | | | | | | | | | | | | | | |
| | T Saensomboonsuk | 15 | 17 | | 1 | Lee CW | 21 | 21 | | | | | | | | | | |
| | V Lång | 21 | 21 | | | V Lång | 10 | 11 | | | | | | | | | | |
| | DH Rumbaka | 17 | 18 | | | | | | | 1 | Lee CW | 21 | 21 | | | | | |
| 9 | Park S-h | 21 | 21 | | | | | | | 9 | Park S-h | 10 | 5 | | | | | |
| | Hsueh H-y | 15 | 15 | | 9 | Park S-h | 21 | 21 | | | | | | | | | | |
| | Shon W-h | 21 | 21 | | | Shon W-h | 14 | 10 | | | | | | | | | | |
| | J Maliekal | 12 | 8 | | | | | | | | | | | | 1 | Lee CW | 21 | 21 |
| 5 | Chen L | 19 | 21 | 25 | | | | | | | | | | | | K Cordón | 7 | 13 |
| | K Cordón | 21 | 8 | 27 | | K Cordón | 21 | 21 | | | | | | | | | | |
| | C Baxter | 8 | 19 | | | H Hurskainen | 19 | 17 | | | | | | | | | | |
| | H Hurskainen | 21 | 21 | | | | | | | | K Cordón | 21 | 19 | 21 | | | | |
| 14 | M Zwiebler | 21 | 21 | | | | | | | | P Abián | 19 | 21 | 17 | | | | |
| | V Atrashchenkov | 19 | 10 | | 14 | M Zwiebler | 17 | 21 | 22 | | | | | | | | | |
| | Y Tan | 21 | 17 | 15 | | P Abián | 21 | 7 | 24 | | | | | | | | | |
| | P Abián | 16 | 21 | 21 | | | | | | | | | | | | | | |

### Section 2

| First Round | First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Third Round | Third Round | Third Round | Third Round | Third Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 4 | T Hidayat | 21 | 21 | | | | | | | | | | | | | | |
| | R Pacheco | 17 | 6 | | 4 | T Hidayat | 17 | 14 | | | | | | | | | |
| | D Wong | 22 | 19 | 21 | | D Wong | 21 | 21 | | | | | | | | | |
| | P Wacha | 20 | 21 | 17 | | | | | | D Wong | 16 | 10 | | | | | |
| 16 | Hu Y | 22 | 18 | | | | | | | H-K Vittinghus | 21 | 21 | | | | | |
| | H-K Vittinghus | 24 | 21 | | | H-K Vittinghus | 21 | 21 | | | | | | | | | |
| | M Lo Ying Ping | 21 | 21 | | | M Lo Ying Ping | 8 | 14 | | | | | | | | | |
| | S Pongnairat | 13 | 15 | | | | | | | | | | | | H-K Vittinghus | 17 | 13 |
| 6 | Chen J | 21 | 21 | | | | | | | | | | | 6 | Chen J | 21 | 21 |
| | R Must | 8 | 10 | | 6 | Chen J | 21 | 21 | | | | | | | | | |
| | S Wojcikiewicz | 12 | 9 | | | D Palyama | 13 | 17 | | | | | | | | | |
| | D Palyama | 21 | 21 | | | | | | 6 | Chen J | 18 | 21 | 21 | | | | |
| 15 | K Tago | 12 | 19 | | | | | | | A Jayaram | 21 | 12 | 11 | | | | |
| | A Jayaram | 21 | 21 | | | A Jayaram | 21 | 21 | | | | | | | | | |
| | M Matejka | 10 | 6 | | | V Ivanov | 19 | 17 | | | | | | | | | |
| | V Ivanov | 21 | 21 | | | | | | | | | | | | | | |

### Section 3

| First Round | 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 | Quarterfinals |
| | Hsieh Y-h | 7 | 9 | | | | | | | | | | | | | | | | |
| | Wong CH | 21 | 21 | | | Wong CH | 13 | 18 | | | | | | | | | | | |
| | E Pang | 21 | 17 | 10 | 10 | B Ponsana | 21 | 21 | | | | | | | | | | | |
| 10 | B Ponsana | 12 | 21 | 21 | | | | | | 10 | B Ponsana | 11 | 15 | | | | | | |
| | K Parupalli | 21 | 23 | 21 | | | | | | 7 | Nguyen TM | 21 | 21 | | | | | | |
| | D Domke | 13 | 25 | 11 | | K Parupalli | 22 | 21 | 20 | | | | | | | | | | |
| | M Zilberman | 10 | 14 | | 7 | Nguyen TM | 24 | 17 | 22 | | | | | | | | | | |
| 7 | Nguyen TM | 21 | 21 | | | | | | | | | | | | 7 | Nguyen TM | 21 | 19 | 13 |
| | P Koukal | 5 | 8 | | | | | | | | | | | | 3 | P Gade | 17 | 21 | 21 |
| | D Zavadsky | 21 | 21 | | | D Zavadsky | 19 | 8 | | | | | | | | | | | |
| | P Martins | 10 | 14 | | 13 | S Santoso | 21 | 21 | | | | | | | | | | | |
| 13 | S Santoso | 21 | 21 | | | | | | | 13 | S Santoso | 18 | 21 | 14 | | | | | |
| | K Mehrabi | 18 | 12 | | | | | | | 3 | P Gade | 21 | 14 | 21 | | | | | |
| | S Pukhov | 21 | 21 | | | S Pukhov | 5 | 9 | | | | | | | | | | | |
| | R Ouseph | 8 | 18 | | 3 | P Gade | 21 | 21 | | | | | | | | | | | |
| 3 | P Gade | 21 | 21 | | | | | | | | | | | | | | | | |

### Section 4

| First Round | First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Third Round | Third Round | Third Round | Third Round | Third Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | A Casey | 16 | 10 | | | | | | | | | | | | | | |
| | T Penty | 21 | 21 | | | T Penty | 13 | 13 | | | | | | | | | |
| | B Leverdez | 21 | 12 | 11 | 11 | S Sasaki | 21 | 21 | | | | | | | | | |
| 11 | S Sasaki | 19 | 21 | 21 | | | | | 11 | S Sasaki | 10 | 24 | 21 | | | | |
| | D Paiola | 13 | 9 | | | | | | 8 | Du PY | 21 | 22 | 10 | | | | |
| | K Yamada | 21 | 21 | | | K Yamada | 12 | 14 | | | | | | | | | |
| | A Chen | 10 | 21 | 12 | 8 | Du PY | 21 | 21 | | | | | | | | | |
| 8 | D Pengyu | 21 | 16 | 21 | | | | | | | | | | 11 | S Sasaki | 14 | 16 |
| | D Snider | 16 | 19 | | | | | | | | | | | 2 | Lin D | 21 | 21 |
| | E Heino | 21 | 21 | | | E Heino | 10 | 7 | | | | | | | | | |
| | Wong WK | 17 | 19 | | 12 | Lee H-i | 21 | 21 | | | | | | | | | |
| 12 | Lee H-i | 21 | 21 | | | | | | 12 | Lee H-i | 16 | 13 | | | | | |
| | S Evans | 21 | 21 | | | | | | 2 | Lin D | 21 | 21 | | | | | |
| | M Lahnsteiner | 15 | 16 | | | S Evans | 15 | 16 | | | | | | | | | |
| | K Navickas | 11 | 10 | | 2 | Lin D | 21 | 21 | | | | | | | | | |
| 2 | Lin D | 21 | 21 | | | | | | | | | | | | | | |