# 2011 BWF World Junior Championships – Mixed doubles

The Mixed Doubles tournament of the 2011 BWF World Junior Championships is a badminton world junior individual championships for the Eye Level Cups, held on November 2–6. The defending champion of the last edition is Liu Cheng / Bao Yixin from China. Indonesian pair Alfian Eko Prasetya and Gloria Emanuelle Widjaja won the gold medal after beat their compatriot Ronald Alexander and Tiara Rosalia Nuraidah in the final round with the score 12–21, 21–17, and 25–23.

## Seeds

The seeds based from the Continental Confederation's recommendation, players performance at the Suhandinata Cup and also using the latest world ranking as a guideline.
* Lukhi Apri Nugroho / Ririn Amelia (third round)
* Wannawat Ampunsuwan / Chonthicha Kittiharakul (quarter-final)
* Nelson Heg / Chow Mei Kuan (semi-final)
* Jim Middleburg / Soraya de Visch Eibergen (fourth round)
* Anatoliy Yartsev / Evgeniya Kosetskaya (fourth round)
* Huang Po-jui / Wu Ti-jung (fourth round)
* Joris Grosjean / Lea Palermo (fourth round)
* Frederik Colberg / Mette Poulsen (fourth round)
* Hafiz Faizal / Shella Devi Aulia (fourth round)
* Kasper Antonsen / Line Kjærsfeldt (quarter-final)
* Lee Hong-je / Shin Seung-chan (quarter-final)
* Gaetan Mittelheisser / Lorraine Baumann (second round)
* Russell Muns / Myke Halkema (fourth round)
* Calvin Ong Jia Hong / Lee Meng Yean (third round)
* Wang Chih-hao / Chen Pai-jou (third round)
* Ronald Alexander / Tiara Rosalia Nuraidah (final)

## Draw
### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| | Choi Sol-gyu Chae Yoo-jung | 21 | 21 | | | | | | | | | | | |
| | Lee Chun Hei Cheung Ngan Yi | 15 | 10 | | | | | | | | | | | |
| | Lee Chun Hei Cheung Ngan Yi | 15 | 10 | | | Choi Sol-gyu Chae Yoo-jung | 18 | 13 | | | | | | |
| | | | | | | Alfian Eko Prasetya Gloria Emanuelle Widjaja | 21 | 21 | | | | | | |
| | Alfian Eko Prasetya Gloria Emanuelle Widjaja | 16 | 21 | 21 | | Alfian Eko Prasetya Gloria Emanuelle Widjaja | 21 | 21 | | | | | | |
| 9/16 | Lee Hong-je Shin Seung-chan | 21 | 16 | 19 | | | | | | | | | | |
| 9/16 | Lee Hong-je Shin Seung-chan | 21 | 16 | 19 | | | | | | | Alfian Eko Prasetya Gloria Emanuelle Widjaja | 12 | 21 | 25 |
| | | | | | | | | | | 9/16 | Ronald Alexander Tiara Rosalia Nuraidah | 21 | 17 | 23 |
| 9/16 | Kasper Antonsen Line Kjærsfeldt | 18 | 17 | | | | | | | | | | | | 9/16 | Ronald Alexander Tiara Rosalia Nuraidah | 21 | 17 | 23 |
| 3/4 | Nelson Heg Chow Mei Kuan | 21 | 21 | | | | | | | | | | | |
| 3/4 | Nelson Heg Chow Mei Kuan | 21 | 21 | | 3/4 | Nelson Heg Chow Mei Kuan | 17 | 22 | 16 | | | | | |
| | | | | | 9/16 | Ronald Alexander Tiara Rosalia Nuraidah | 21 | 20 | 21 | | | | | |
| 9/16 | Ronald Alexander Tiara Rosalia Nuraidah | 21 | 21 | | 9/16 | Ronald Alexander Tiara Rosalia Nuraidah | 21 | 20 | 21 | | | | | |
| 2 | Wannawat Ampunsuwan Chonthicha Kittiharakul | 15 | 16 | | | | | | | | | | | |

### Top Half
#### Section 1

| Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round |
| 1 | L Nugroho R Amelia | 10 | 21 | 21 | | | | | | | | |
| | R Walker S Brown | 21 | 18 | 10 | | | | | | | | |
| | | | | | 1 | L Nugroho R Amelia | 21 | 15 | 20 | | | |
| | | | | | | Choi S-g Chae Y-j | 19 | 21 | 22 | | | |
| | Choi S-g Chae Y-j | 21 | 21 | | | | | | | | | |
| | T Wong J Guan | 12 | 8 | | | | | | | | | |
| | | | | | | | | | | Choi S-g Chae Y-j | 21 | 21 |
| | | | | | | | | | | Lin C-Y Shuai P-L | 19 | 17 |
| 9/16 | C Ong Lee MY | 21 | 21 | | | | | | | | | |
| | O Larkimo A Mikkelä | 17 | 18 | | | | | | | | | |
| | | | | | 9/16 | C Ong Lee MY | 19 | 16 | | | | |
| | | | | | | Lin C-Y Shuai P-L | 21 | 21 | | | | |
| | Lin C-Y Shuai P-L | 21 | 15 | 21 | | | | | | | | |
| | T Inoue N Shinoya | 19 | 21 | 16 | | | | | | | | |

#### Section 2

| First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round |
| | | | 5/8 | A Yartsev E Kosertskaya | 21 | 21 | | | | | | | | | |
| | | | | V Šelong J Žwaková | 10 | 12 | | | | | | | | | |
| | | | | | | | 5/8 | A Yartsev E Kosetskaya | 21 | 20 | 21 | | | | |
| | | | | | | | | M Byerly J Karnott | 13 | 22 | 11 | | | | |
| | | | | C Wong K Tung | 15 | 16 | | | | | | | | | |
| | | | | M Byerly J Karnott | 21 | 21 | | | | | | | | | |
| | | | | | | | | | | | | 5/8 | A Yartsev E Kosetskaya | 12 | 18 |
| | | | | | | | | | | | | | Lee CH Cheung NY | 21 | 21 |
| | | | 9/16 | G Mittelheisser L Baumann | 17 | 13 | | | | | | | | | |
| | | | | S Tovannakasem W Hongchookeat | 21 | 21 | | | | | | | | | |
| | | | | | | | | S Tovannakasem W Hongchookeat | 16 | 21 | 17 | | | | |
| | | | | | | | | Lee CH Cheung NY | 21 | 18 | 21 | | | | |
| | | | | A Şenol E Tunalı | 14 | 17 | | | | | | | | | |
| R Tabeling G Mahulette | 15 | 12 | | Lee CH Cheung NY | 21 | 21 | | | | | | | | | |
| Lee CH Cheung NY | 21 | 21 | | | | | | | | | | | | | |

#### Section 3

| First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| | | | 3/4 | J Middleburg S Eibergen | 21 | 21 | | | | | | | | | |
| | | | | Y El Fattah T Aya | 7 | 5 | | | | | | | | | |
| | | | | | | | 3/4 | J Middleburg S Eibergen | 23 | 21 | | | | | |
| | | | | | | | | J Maio D Lansac | 21 | 12 | | | | | |
| | | | | J Maio D Lansac | 21 | 22 | | | | | | | | | |
| | | | | Tai AK SJ Lai | 18 | 20 | | | | | | | | | |
| | | | | | | | | | | | 3/4 | J Middleburg S Eibergen | 22 | 12 | 16 |
| | | | | | | | | | | | | A Prasetya G Widjaja | 20 | 21 | 21 |
| | | | 9/16 | Wang C-H Chen P-J | 21 | 21 | | | | | | | | | |
| | | | | A Susanto D Long | 12 | 11 | | | | | | | | | |
| | | | | | | | 9/16 | Wang C-H Chen P-J | 25 | 7 | | | | | |
| | | | | | | | | A Prasetya G Widjaja | 27 | 21 | | | | | |
| | | | | C Karunaratne K Sirimannage | 8 | 15 | | | | | | | | | |
| H Thandarang A Sunil | 14 | 13 | | A Prasetya G Widjaja | 21 | 21 | | | | | | | | | |
| A Prasetya G Widjaja | 21 | 21 | | | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| | | | 5/8 | F Colberg M Poulsen | 21 | 21 | | | | | | | | | |
| | | | | N Sekiguchi A Ohori | 12 | 17 | | | | | | | | | |
| | | | | | | | 5/8 | F Colberg M Poulsen | 21 | 21 | | | | | |
| | | | | | | | | A Lau B So | 16 | 11 | | | | | |
| | | | | A Quadri M Ugalde | 6 | 12 | | | | | | | | | |
| | | | | A Lau B So | 21 | 21 | | | | | | | | | |
| | | | | | | | | | | | 5/8 | F Colberg M Poulsen | 11 | 21 | 18 |
| | | | | | | | | | | | 9/16 | Lee H-J Shin S-C | 21 | 19 | 21 |
| | | | 9/16 | Lee H-J Shin S-C | 21 | 21 | | | | | | | | | |
| | | | | Law CH Yung NW | 11 | 17 | | | | | | | | | |
| | | | | | | | 9/16 | Lee H-J Shin S-C | 21 | 21 | | | | | |
| | | | | | | | | S Thammasin N Lam | 15 | 13 | | | | | |
| | | | | Lou H-M Wong K-I | 5 | 9 | | | | | | | | | |
| S Thammasin N Lam | 21 | 21 | | S Thammasin N Lam | 21 | 21 | | | | | | | | | |
| A Danskanen S Pekkola | 16 | 11 | | | | | | | | | | | | | |

### Bottom Half
#### Section 5

| First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round |
| E Lale N Kılıç | 8$^r$ | | | | | | | | | | | | | |
| T Wolfenden H Smith | 20 | | T Wolfenden H Smith | 14 | 21 | 14 | | | | | | | | |
| | | | S Sirant R Gabdullina | 21 | 18 | 21 | | | | | | | | |
| | | | | | | | | S Sirant R Gabdullina | 15 | 14 | | | | |
| | | | | | | | 9/16 | K Antonsen L Kjærsfeldt | 21 | 21 | | | | |
| | | | H Samy R Osman | 5 | 9 | | | | | | | | | |
| | | 9/16 | K Antonsen L Kjærsfeldt | 21 | 21 | | | | | | | | | |
| | | | | | | | | | | | 9/16 | K Antonsen L Kjærsfeldt | 21 | 21 |
| | | | | | | | | | | | 5/8 | Huang P-j Wu T-j | 11 | 7 |
| | | | S Kidambi M Kukkapalli | 24 | 17 | 13 | | | | | | | | |
| | | | Tam CH Yuen SY | 22 | 21 | 21 | | | | | | | | |
| | | | | | | | | Tam CH Yuen SY | 17 | 14 | | | | |
| | | | | | | | 5/8 | Huang P-j Wu T-j | 21 | 21 | | | | |
| | | | Jun B-C Lee S-H | 16 | 21 | 18 | | | | | | | | |
| | | 5/8 | Huang P-J Wu T-J | 21 | 16 | 21 | | | | | | | | |

#### Section 6

| 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 | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| M Cudiamat J De Vera | 8 | 16 | | | | | | | | | | | | | | | |
| A Ishak Tan WH | 21 | 21 | | A Ishak Tan WH | 21 | 15 | 21 | | | | | | | | | | |
| | | | | J Kuo E Kan | 14 | 21 | 12 | | | | | | | | | | |
| | | | | | | | | | A Ishak Tan WH | 14 | 11 | | | | | | |
| | | | | | | | | 9/16 | H Faizal S Aulia | 21 | 21 | | | | | | |
| | | | | A Selladurai G Somerville | 13 | 8 | | | | | | | | | | | |
| | | | 9/16 | H Faizal S Aulia | 21 | 21 | | | | | | | | | | | |
| | | | | | | | | | | | | | 9/16 | H Faizal S Aulia | 21 | 19 | 21 |
| | | | | | | | | | | | | | 3/4 | N Heg Chow MK | 18 | 21 | 23 |
| | | | | N Yakura C Tsai | 25 | 21 | | | | | | | | | | | |
| | | | | D Watanabe C Hoshi | 23 | 14 | | | | | | | | | | | |
| | | | | | | | | | N Yakura C Tsai | 22 | 14 | 16 | | | | | |
| | | | | | | | | 3/4 | N Heg Chow MK | 20 | 21 | 21 | | | | | |
| | | | | M Laibacher L Wich | 11 | 17 | | | | | | | | | | | |
| | | | 3/4 | N Heg Chow MK | 21 | 21 | | | | | | | | | | | |

#### Section 7

| 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 | Fourth round | Fourth round | Fourth round | Fourth round |
| A Wilkinson J Chan | 13 | 19 | | | | | | | | | | | | | | |
| PS Low V Mak | 21 | 21 | | PS Low V Mak | 7 | 7 | | | | | | | | | | |
| | | | | Wang C-L Chen S-Y | 21 | 21 | | | | | | | | | | |
| | | | | | | | | | Wang C-L Chen S-Y | 8 | 21 | 20 | | | | |
| | | | | | | | | 9/16 | R Alexander T Nuraidah | 21 | 15 | 22 | | | | |
| | | | | T Özsoy Ö Toyran | 21 | 7 | 15 | | | | | | | | | |
| | | | 9/16 | R Alexander T Nuraidah | 18 | 21 | 21 | | | | | | | | | |
| | | | | | | | | | | | | | 9/16 | R Alexander T Nuraidah | 22 | 21 |
| | | | | | | | | | | | | | 5/8 | J Grosjean L Palermo | 20 | 14 |
| | | | | Bae K-Y Kim C-M | 21 | 21 | | | | | | | | | | |
| | | | | M Elsayad N Ashraf | 13 | 16 | | | | | | | | | | |
| | | | | | | | | | Bae K-Y Kim C-M | 19 | 20 | | | | | |
| | | | | | | | | 5/8 | J Grosjean L Palermo | 21 | 22 | | | | | |
| | | | | R Kargaev O Morozova | 17 | 17 | | | | | | | | | | |
| | | | 5/8 | J Grosjean L Palermo | 21 | 21 | | | | | | | | | | |

#### Section 8

| Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round |
| | A Khor L Tong | 10 | 10 | | | | | | | | |
| | R McCarthy E Westwood | 21 | 21 | | | | | | | | |
| | | | | | R McCarthy E Westwood | 20 | 20 | | | | |
| | | | | 9/16 | R Muns M Halkema | 22 | 22 | | | | |
| | S Jani J Choong | 19 | 16 | | | | | | | | |
| 9/16 | R Muns M Halkema | 21 | 21 | | | | | | | | |
| | | | | | | | | 9/16 | R Muns M Halkema | 15 | 16 |
| | | | | | | | | 2 | W Ampunsuwan C Kittiharakul | 21 | 21 |
| | T Saito S Hayakawa | 21 | 21 | | | | | | | | |
| | M Lamsfuß F Volkmann | 14 | 19 | | | | | | | | |
| | | | | | T Saito S Hayakawa | 13 | 13 | | | | |
| | | | | 2 | W Ampunsuwan C Kittiharakul | 21 | 21 | | | | |
| | K Koljonen J Nyström | 15 | 14 | | | | | | | | |
| 2 | W Ampunsuwan C Kittiharakul | 21 | 21 | | | | | | | | |