A 3-1 home win over Hibernian saw Celtic extend their lead over Rangers at the top of the SPL to four points. A brace from Scott McDonald and one from Stephen McManus proved decisive after Hibs threatened to snatch an equaliser after captain Rob Jones pulled a goal back from a free kick for 2-1.

Again, however, it was Celtic's vulnerability at set pieces which is giving boss Gordon Strachan cause for concern.

"It doesn't make me happy," he said. "We thought we did a fair amount of work on it and talked about it but we have to come up with answers.

"In saying that, sometimes there are some fantastic deliveries; Charlie (Mulgrew's) deliveries last week and Derek Riordan's in this game were excellent.

"But we have to come up with something to deal with excellent deliveries."

Hibs conceded from two corners as noted by boss Mixu Paatelainen.

"To be 2-0 down after 10 minutes from corner kicks wasn't the start we wanted," he said.

"We practise all the time how to defend and attack set pieces and we have to do more work because we were a little sloppy.

"That gave us a mountain to climb and it wasn't good enough.

"In fairness, the boys kept their heads after that; we passed the ball and got it back to 2-1.

"In the second half, we might have got the equaliser but it wasn't to be."