柳延星
Setiawan and Ahsan won three titles in 2015, Malaysia Open 2015, BWF Super Series Finals 2015, and their second World Champions as a pair after winning 2015 BWF World Championships in their home-country defeated the Chinese pair Liu Xiaolong and Qiu Zihan 21–17, 21–14. They failed to captured the Badminton Asia Championships 2015 after beaten by their rival Lee Yong-dae and Yoo Yeon-seong 21–18, 22–24, 19–21.