Don't think there s any doubt that had Kyle been at his best at key moments in the 1st 2 sets, he could easily have run out a winner 3&1. But if he is able to battle through this and get the win, it may do him the world of good in the end, given his reported fragility the longer the match goes.
What worries me is that whilst Kyle at his best is the better player, but Muņoz has played much better than Kyle and key times. And we are coming to the biggest moment of all now.