Celtic thumped Aberdeen 4-0 at Pittodrie on Sunday to stay top of the Ladbrokes Premiership.
All the goals came in the first half, with Odsonne Edouard, Jeremie Frimpong, James Forrest and Mohamed Elyounoussi all on target.
Rangers remain second on goal difference after hitting back to beat Motherwell 2-1 at Ibrox.
Devante Cole gave Well the lead and James Tavernier missed a penalty before Jermain Defoe equalised in first-half stoppage time. Defender Filip Helander grabbed the winner with 10 minutes left.