As the pressure ramps up at Rangers, it’s advantage Celtic in the title race. The Gers’ abysmal run of one win in four Scottish Premiership matches has surrendered an albeit slender lead at the top of the Scottish game. With four points in it – and Rangers able to pull that back to one with victory over Dundee – it will be all to play for heading into the Scottish top flight’s split. There may well be more twists and turns to come but there’s a growing sentiment that one fixture in particular could make or break Rangers’ season. Do Rangers need to go to Celtic Park and win?The fourth and final…