Ki Sung-yueng (Korean: 기성용, Korean pronunciation: [ki sʰʌŋjoŋ]; born 24 January 1989) is a South Korean professional footballer who currently plays as a central midfielder for Premier League club Swansea City, and as the captain of the South Korean national team.
Ki is known for his vision, technique, long-range passing and shooting, along with his good set-pieces.
He has been a full international for South Korea since 2007, gaining over 70 caps. Ki was selected in their squads for two World Cups and the 2011 and 2015 AFC Asian Cups, finishing as runner-up in the latter tournament. He has also played at two Olympic Games with his country, winning bronze in 2012.
In 20 May 2015, Ki was voted as Swansea City Player of the Year as he netted 8 goals in 36 appearances.