Lee had a slight case of the flu last week and told Feyenoord that he also had problems adapting to life in Holland.

"We think that Chun-Soo Lee recovers best in his own environment," technical manager Peter Bosz told the club's website.

Lee also had problems with adapting during his first spell in Europe with Numancia and Real Sociedad in Spain, where he also got permission to return to South Korea.