Mikael Lustig believes Rangers will be wondering what they have to do to beat Celtic in the build-up to the Scottish Cup semi-final at Hampden on Sunday.

The Hoops are looking to extend their unbeaten run against their old rivals to 10 games as they aim for a second successive domestic treble.

Asked if that run could play on the minds of the Gers players, the Sweden international said: “Maybe a little bit. Obviously you need to find a new way to play or do something different and that cannot be good.