Sung Han-kuk

Sung Han-kook (born November 19, 1963) is a former badminton player and coach from South Korea.

Sung won the men's singles title at the 1986 U.S. Open and earlier that year, he won bronze at the 1986 Asian Games as well as men's team gold.He was also a part of the team that finished as runner-up at the inaugural Sudirman Cup in 1989.

In 1989, Sung married two-time All England winner Kim Yun-ja. Sung and Kim's daughter Sung Ji-hyun is also a badminton player.

After retiring, Sung had a long career as a coach, both for Korean professional teams and for the national team. He became the head coach of the national team in December 2010 and held the post until he was dismissed in August 2012 following a match-throwing scandal at the London Olympics.