Moussa Dembele bagged a brace as Celtic dismissed Ladbrokes Premiership rivals Aberdeen with a commanding 3-0 win at Pittodrie.
Only goal difference separated the sides at the start of the evening but a huge gulf in class was revealed as first-half goals from left-back Kieran Tierney and the French striker had the desperate Dons on the ropes.
Dembele, who had come off the bench to score twice in the 4-2 Betfred Cup semi-final win over Hibernian at the weekend, headed in a second in the 63rd minute and there could have been more before the end.
Aberdeen lost six times to Celtic last season, including in both domestic cup finals, and again they found the imperious Parkhead men simply too good.
The powerful, pacey and talented Hoops have now gone 61 domestic games unbeaten and, on this form, a second successive Scottish treble without losing a game cannot be discounted.