Celtic moved eight points clear at the top of the Scottish Premiership thanks to a 2-0 away win over bottom club St Mirren on Friday night.
James Forrest broke Saints' resistance in 64 minutes after being picked out by Adam Matthews and Stefan Johansen sealed the victory from the penalty spot when Viktor Genev handled a Forrest shot in the box.
St Mirren remain four points adrift at the foot of the table ahead of Tuesday's crucial clash with Motherwell at Fir Park.