Liu Xiaolong (L) and Qiu Zihan from China show the medals after winning the match against Sung Hyun Ko and Yong Dae Lee of South Korea during the men's doubles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Liu and Qiu won the championship by 2-0.(Xinhua/Partha Sarkar)

Liu Xiaolong (Front) and Qiu Zihan from China return a ball against Sung Hyun Ko and Yong Dae Lee of South Korea during the men's doubles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Liu and Qiu won the championship by 2-0.(Xinhua/Partha Sarkar)

Liu Xiaolong from China celebrates after winning against Sung Hyun Ko and Yong Dae Lee of South Korea during the men's doubles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Liu and Qiu won the championship by 2-0. (Xinhua/Partha Sarkar)

Tontowi Ahmad (R) and Liliyana Natsir from Indonesia celebrate after winning the match against Sung Hyun Ko and Ha Na Kim of South Korea during the mixed doubles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Tontowi Ahmad and Liliyana Natsirwon the championship by 2-0. (Xinhua/Zheng Huansong)

Tontowi Ahmad (Top) and Liliyana Natsir from Indonesia return a ball against Sung Hyun Ko and Ha Na Kim of South Korea during the mixed doubles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Tontowi Ahmad and Liliyana Natsirwon the championship by 2-0. (Xinhua/Zheng Huansong)

Christinna Petersen (R)and Kamilla Rytter Juhl of Denmark return a ball against Miyuki Maeda and Satoko Suetsuna of Japan during the women's doubles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Miyuki Maeda and Satoko Suetsuna won the championship 2-1. (Xinhua/Zheng Huansong)

Miyuki Maeda (L) and Satoko Suetsuna of Japan celebrate after winning the match against Christinna Petersen and Kamilla Rytter Juhl of Denmark during the women's doubles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Miyuki Maeda and Satoko Suetsuna won the championship 2-1. (Xinhua/Zheng Huansong)

Miyuki Maeda (L) and Satoko Suetsuna of Japan return a ball against Christinna Petersen and Kamilla Rytter Juhl of Denmark during the women's doubles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Miyuki Maeda and Satoko Suetsuna won the championship 2-1. (Xinhua/Zheng Huansong)

Ratchanok Intanon of Thailand returns a ball against Juliane Schenk of Germany during the women's singles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Ratchanok Intanon won the championship 2-0. (Xinhua/Zheng Huansong)

Juliane Schenk of Germany returns a ball against Ratchanok Intanon of Thailand during the women's singles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Ratchanok Intanon won the championship 2-0. (Xinhua/Zheng Huansong)

 Ratchanok Intanon of Thailand returns a ball against Juliane Schenk of Germany during the women's singles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Ratchanok Intanon won the championship 2-0. (Xinhua/Zheng Huansong)

Ratchanok Intanon of Thailand gestures to the spectators after winning the match against Juliane Schenk of Germany during the women's singles final of the 2013 India Open badminton tournament in New Delhi, capital of India, April 28, 2013. Ratchanok Intanon won the championship 2-0. (Xinhua/Zheng Huansong)