Rangers were thumped by Celtic for the second time in two weeks as Brendan Rodgers' men wrapped up the Scottish Premiership title again.
Celtic destroyed rivals Rangers 5-0 in the Old Firm derby to claim a seventh successive Scottish Premiership title.
Brendan Rodgers' men beat Rangers 4-0 in the Scottish Cup semi-final two weeks ago but eclipsed that heavy defeat with an even more humiliating thrashing at Parkhead on Sunday.
Celtic can now complete a second consecutive domestic treble under Rodgers - a reported target for Arsenal - if they beat Motherwell in next month's Scottish Cup final.