USOpen: Wawrinka though, will meet much bigger challenge on the semifinals – Novak Djokovic.This will be seventh year in a row for the Serbian to make the semis, and he has really proving to be Number 1 in the world with his consistency. He will guarantee his first spot for 2013, if he reaches the final, but this is not his only goal. Besides the ranking points, Djikovic will without doubt try to get his hands on the trophy, now the path is Murray-free. It’s an amazing chance for Nole to arrange a meet with Rafael Nadal on the final, but before that, he will have to find a way to stop Wawrinka powerful serve and make the less turnovers he can.