Rangers have blown the chance to extend their lead at the top of the Scottish Premiership after slipping up against Motherwell at Ibrox. The Gers spurned a host of good opportunities to score in the match and succumbed to a surprise 2-1 defeat against the Steelmen in Glasgow. Motherwell put in a spirited display and were good value for at least a point from the fixture, striker Theo Bair proving a handful throughout and opening the scoring in the first half. Rangers captain James Tavernier had equalised from the penalty spot around the hour mark before Dan Casey took advantage of a disjointed …