Player name: Ki Sung-yueng (commonly romanized as Sung-yong Ki)

Nationality: South Korea

Born: January 24, 1989 (Seoul, South Korea)

Primary position: Central midfield (deep-lying playmaker / holding midfielder)

Club career (highlights):

• 2008–2010: FC Seoul (South Korea) — developed in the youth system and made senior breakthrough
• 2010–2012: Celtic FC (Scotland) — won Scottish Premiership titles and Scottish Cup
• 2012–2019: Swansea City (Wales/English Premier League) — key midfield presence, helped consolidate Swansea in the Premier League
• 2018: Sunderland (loan, England)
• 2019–2020: Newcastle United (England)
• 2020–2021: FC Seoul (return)
• 2021–2022: Busan IPark (South Korea)

International career (highlights):

• South Korea U20/U23 and senior national team regular
• Made senior debut in 2008
• Represented South Korea at multiple major tournaments, including the 2010 FIFA World Cup, the 2014 FIFA World Cup, and the 2018 FIFA World Cup
• Key player in South Korea’s midfield, often deployed as a deep-lying playmaker known for passing range and game management
• Over 100 caps for South Korea (centurion)

Style of play: Intelligent, composed on the ball, good passing accuracy and vision, strong tactical awareness. Often used to dictate tempo from deeper midfield areas and protect the back line.

Notable achievements:

• Scottish league and cup honors with Celtic
• Regular starter in the English Premier League with Swansea City
• Over 100 international caps for South Korea

Retirement / current status: After returning to South Korea and finishing spells with FC Seoul and Busan IPark, Ki moved toward the latter stages of his playing career; status may have changed recently so consult up-to-date sources for his current club or retirement confirmation.