Former Celtic striker Chris Killen has hit out at Bhoys manager Tony Mowbray for having made it known that he wanted to make major changes at Parkhead in the January transfer window.
The New Zealand international has joined Middlesbrough along with Barry Robson and Willo Flood and is unhappy with the ways things turned out with the SPL giants.
Killen told the Daily Record: "I think what he said did upset a lot of the players, if we're being honest about it.
"The feeling at the training ground lately has been a bit confused, but that's fine. We're all professional football players and we realise that this is what happens when a new man takes over.
"He comes in with his own ideas and his own plans for the club. He wants to bring his own men and that's his prerogative."