The Hoops boss made 10 substitutions in one go in the second half and 30-year-old striker Griffiths, recently cleared by police over allegations of sending inappropriate messages to two schoolgirls, elicited a negative reaction.Insurance Loans Mortgage Attorney Credit Lawyer
Police Scotland said it had established 'no criminality' after carrying out a 'full assessment' on claims Griffiths exchanged improper messages with a 15-year-old girl as well as another teen girl on social media.
Some supporters then got behind the forward, who recently signed a new one-year extension with the Parkhead club, and he caused a stir in the stands every time he got on the ball.
Asked if he was confident the Scotland international can win over the fans, boss Postecoglou said: 'That's going to be down to Leigh and his performances.
Celtic manager Ange Postecoglou says Leigh Griffiths has to win back his own fans after he was cleared by police over allegations of sending inappropriate messages to two schoolgirls
Some Celtic fans booed the forward when he played during Celtic's 6-2 loss to West Ham
'If he works hard at training and produces the kind of football he can, scoring goals, I'm sure the crowd will get behind him.
'I won't be telling the Celtic supporters anything. They've followed this club a lot longer than I've been here.