Ki Sung-yueng is a South Korean professional footballer known for his skills as a midfielder. Born on January 24, 1989, in Seongnam, South Korea, he began his career at FC Seoul before moving to Europe, where he played for clubs like Celtic and Swansea City. Ki has represented the South Korea national team in multiple international tournaments, including the FIFA World Cup and the AFC Asian Cup. His playing style is characterized by strong passing ability and tactical awareness, making him a valuable asset on the field.