Rangers players shouldn’t need any extra motivation to play Celtic. Especially – as will be the case next weekend – when the advantage in the title race is on the line. Whilst Celtic go into the game as league leaders, the Gers can topple them to take a two point lead with victory whilst a few days later Philippe Clement’s men head to Dundee. It’s a potential five point swing in Rangers’ favour and with only six games to go after the trip to Dens Park, securing two victories would be a big step closer to the trophy. What’s more with the match being at Ibrox – without a Celtic fan in sight – an…