Scotland have been forced to make a change in their team for tomorrow’s RBS 6 Nations Championship match against Italy at Murrayfield (kick-off 2.30pm). In spite of intensive treatment Glasgow Warriors’ Max Evans has not recovered sufficiently from an ankle strain he sustained against England last weekend. Nikki Walker, the 29-year-old Ospreys wing, will replace Evans.  Walker will be winning his 22nd cap.    Scotland head coach Andy Robinson said: “Our medical team have worked tirelessly as ever but Max is not quite right for the rigours of a Test match. “We wish him a speedy recovery.  Nikki has been part of our squad throughout the championship and played in our last Murrayfield international against Ireland.  This is a golden opportunity for him now to produce a special performance. “We approach tomorrow with confidence and determined to give the Murrayfield crowd a lot to cheer about.”