Yoo Yong-sung (; born 25 October 1974) is a retired badminton player from South Korea. He is two time Olympic silver medalist. Achievements Olympic Games Men's doubles World Championships Men's doubles World Cup Men's doubles Asian Games Men's doubles Mixed doubles Asian Championships Men's doubles Mixed doubles Asian Cup Men's doubles Mixed doubles East Asian Games Men's doubles Mixed doubles IBF World Grand Prix The World Badminton Grand Prix sanctioned by International Badminton Federation (IBF) since 1983. Men's doubles Mixed doubles IBF International Men's doubles References External links South Korean male badminton players 1974 births Living people People from Dangjin Badminton players at the 1996 Summer Olympics Badminton players at the 2000 Summer Olympics Badminton players at the 2004 Summer Olympics Olympic badminton players of South Korea Olympic silver medalists for South Korea Olympic medalists in badminton Medalists at the 2000 Summer Olympics Medalists at the 2004 Summer Olympics Badminton players at the 1994 Asian Games Badminton players at the 1998 Asian Games Badminton players at the 2002 Asian Games Asian Games gold medalists for South Korea Asian Games silver medalists for South Korea Asian Games bronze medalists for South Korea Asian Games medalists in badminton Medalists at the 1994 Asian Games Medalists at the 1998 Asian Games Medalists at the 2002 Asian Games World No. 1 badminton players Sportspeople from South Chungcheong Province