Celtic have opened up a four-point gap at the top of the SPL table with a convincing 4-0 win at Hearts.
The visitors took the lead after only two minutes when Scott Brown's shot found the bottom corner.
It was 2-0 on 18 minutes as Victor Wanyama pounced to convert Charlie Mulgrew's corner.
The Bhoys added a third before the end of the half as Joe Ledley headed in Giorgios Samaras's cross from close range.
The result was put beyond doubt on the hour when Gary Hooper swept in from another Mulgrew corner.
