Steve Clarke has not yet had the luxury of confronting.But on Tuesday the Scotland boss was able to name both Andy Robertson and Kieran Tierney in a squad for the first time - and now he has a couple of weeks to work out how to fit two of the best left-backs in Britain into the same starting line-up.Clarke said: “The fact Kieran is back available for selection is a great thing because you want as many good players as you can in the squad.“I’m delighted Kieran is in there, I’m delighted Andy’s in