Celtic moved six points clear at the top of the Premiership with a 4-0 home win over second-placed Aberdeen on Sunday.
The Dons were the better team in the first half and missed some good chances but it was the home side who took the lead after 37 minutes when Jason Denayer headed home a Stuart Armstrong corner.
Celtic took control in the second half and Leigh Griffiths converted a 63rd-minute penalty after Mark Reynolds had impeded Stefan Johansen.
Gary Mackay-Steven added the third goal with a low drive that went in off the post and Johansen wrapped things up with 10 minutes left.
Ronny Deila's men have the chance to extend their advantage at the summit to nine points when they play St Johnstone in a rearranged game at Parkhead on Wednesday.