Celtic have a 13-point lead at the top of the table and Hartson believes that it would be the sporting thing to do.
He said (quoted by Daily Record): “I think they would come out of it with huge respect and gratitude. Rangers would come away with an awful lot of credit if they were to say ‘you have been worthy champions, you have a massive lead’. I can honestly say I’d be saying exactly the same if Rangers had the lead. Celtic have got to probably lose five of their last eight games to be overtaken.