Celtic striker Leigh Griffiths says Sunday’s 1-1 draw with Rangers at home should serve as a reminder that they need to stay focused until the end of the season.

The Parkhead club remain unbeaten in the Scottish Premiership but Griffiths feels they could lose that record if they continue to perform as they did on Sunday.

Stuart Armstrong opened the scoring in the first-half but Celtic failed to add to their advantage, with Clint Hill snatching a point for the visitors late on.

The two sides contest an Old Firm Scottish Cup semi-final clash at Hampden on April 23 and Griffiths wants Celtic to remain focused until the end of the season as they bid to wrap up a domestic treble.

“It wasn’t our greatest performance but you have to give Rangers a bit of credit because they came here and stuck to their game plan and got a point,” he told reporters.

“For us, it was all about continuing that unbeaten run and taking another step towards wrapping up the title.

“There had been a lot of talk about us going and scoring a lot of goals but you’ll have seen in our last few games against them that Rangers have shut up shop.

“We knew that it would be a close game, that they’d come here to defend and hit us on the counter. “But our display was poor.

Hopefully, when we go to Hampden for the semi-final we can show everyone what we’re all about.”

Celtic travel to Dundee in the next round of Premiership fixtures and they are 1.20 to secure a win. Dundee can be backed at 12.00 and a draw is available at 7.00.