Ange Postecoglou has defended Giorgos Giakoumakis over his comments that riled Rangers star Ryan Jack.
And the Celtic boss has urged the rest of his stars to follow the Greek striker's lead and "speak from the heart."
Hitman Giakoumakis said in the build-up to last weekend's derby that he felt Celtic were better than their rivals in every area and would go on to win the league.