Chris Sutton says Celtic made ‘unforgivable’ mistake this season despite winning Scottish Premiership

Celtic celebrate winning the Scottish Premiership title (Picture: Getty)Chris Sutton says Celtic made an ‘unforgivable’ mistake this season despite clinching yet another Scottish Premiership title.Brendan Rodgers’ side smashed Kilmarnock 5-0 on Wednesday night to seal a 12th league title in 13 seasons.Celtic have amassed 90 points from 37 games ahead of the final day of the season, with Rangers back on 84 after a crucial defeat to their arch-rivals at the weekend.Sutton has pra