Ko Sung-hyun
In 2013, he became the champion at the Chinese Taipei and South Korea Grand Prix Gold tournament. At the Chinese Taipei, he and Kim Sa-rang beat the host partner Lee Sheng-mu and Tsai Chia-hsin in the straight set. At the Korea, they won the title after beat their compatriots Ko Sung-hyun and Shin Baek-cheol with the score 2-1. He also won a silver medal at the 2013 Badminton Asia Championships in Taipei. At the 2013 BWF World Championships in Guangzhou, he and his partner were seeded fifth in that tournament. They beat the second seeded of Malaysia in the quarterfinal round, and in the semifinal round they were defeated by Boe and Mogensen in three sets, and settle for the bronze medal. At the end of the 2013 BWF Season, he qualified to compete at the Super Series Masters Finals in Kuala Lumpur, Malaysia. Finally, he became the runner-up in the men's doubles event after defeated by Mohammad Ahsan and Hendra Setiawan of Indonesia.