South KoreaPlaying career
10South Korea men's national football team2001–2015
Bayer 04 Leverkusen2002–2004
Arminia Bielefeld2002–2003
Eintracht Frankfurt2004–2006
1. FSV Mainz 052006–2007
TuS Koblenz2007–2009
SC Freiburg2009–2010
Celtic F.C.2010–2012
Fortuna Düsseldorf2012–2013
FC Seoul2013–2015