Bhoys manager club will do well to retain services of key players.
Celtic boss Neil Lennon had admitted the club face a battle to keep hold of their players according to BBC Sport.
The Scottish club have surpassed expectations this year with some impressive performances in the Champions League.
Their 5-0 aggregate score line against Juventus fails to do justice to the quality of the football Celtic played over the two legs.
‘There’ll be players who want to progress their careers and it’s a progression for us too.
‘We want to bring players in, develop them and sell them on [for a profit]. So far that strategy’s worked for us.’
The club did well to hold on to a number of their key players during the January transfer window. Norwich City showed strong interest in signing striker Gary Hooper while Manchester United have been repeatedly linked with a move for pugnacious midfielder Victor Wanyama.
Joe Ledley’s contract is set to expire at the end of the season and talks have yet to begin on a new deal.
‘We’ll have to look at things and see how the players are feeling at the end of the season. We have a Championship to win and we’re in a cup semi-final’ said Lennon.