Celtic coach Jan Mjallby admits midfielder Ki Sung-yueng wants to leave.
Mjallby said: "Ki is not travelling.
"He is keen to move on and the club is in discussion with another club so we have to wait and see what happens. I can't say who the club is.
"There have been a few clubs interested in him but I know for sure there has been one bid for him and I think maybe one or two other bids.
"He is a quality player but on the other hand he is keen to move on so the club needs to do something.
"He was away at the Olympics for a period of time but we will be sorry to see him go."