Rangers forward Kyle Lafferty admits it will be difficult to beat Old Firm rivals Celtic in just over a week's time.
The Hoops have strung together seven league victories to go within four points of Lafferty's 'Gers, who left it late to beat Inverness 2-1 on Saturday, and the Northern Irishman is remaining wary of their Glasgow foes.
"Celtic gave them a real game of it and I even felt they should have won in the end.
"Celtic play some amazing football at times and now they have come out of the bad spell they had earlier in the season.
"I wouldn't go so far as to say our visit to their place for the last game of this year (on December 28) is a concern in any way but victory will go to the team who wants it the most and has the bottle to get a result.
"Somebody's going to have to find an extra gear that night.""I watched their (Europa League) game with Udinese (last week) and it's obvious the Italians are no pub team," Lafferty said.
