Ko Sung-hyun
Now he's pairing with a younger partner Mohammad Ahsan. They won their first tournament in 2013 Malaysia Open Superseries after beating Korean pair Lee Yong-dae and Ko Sung-hyun 21–15, 21–13 in the final. They also won their second tournament in 2013 Indonesia Open Superseries Premier again with another victory against Lee Yong-dae and Ko Sung-hyun with straight game 21–14 and 21–18. Once again, they defeated the Korean pair for the third time in third final of Superseries tournament with straight sets 21–15 and 21–18 at the 2013 Singapore Open Superseries on June 23, 2013. In August 2013, they became World Champions after winning 2013 BWF World Championships defeated the Danes pair Mathias Boe and Carsten Mogensen 21–13, 23–21, without losing any single game to all of their opponents since the first round. in the end of 2013, they won the 2013 after defeated Kim Gi-jung