Celtic are in the thick of a straight shoot-out with Rangers for the Scottish Premiership title that could go down to the wire this season. The Bhoys have just six league matches left to play and sit a point ahead of their bitter rivals, who have a game in hand. Nevertheless, Brendan Rodgers’ men can open up a four-point lead at the summit should they topple St Mirren at Parkhead on Saturday afternoon. Stephen Robinson’s side arrive in Glasgow’s east end with just one victory in their last five fixtures; nevertheless, they have designs on securing continental qualification, signifying we may n…