Stan Wawrinka ♦ Amazing Backhands in Grand Slam (HD)NEW YORK -- It seems surreal, but this US Open is the first Grand Slam since the 2004 French Open that doesn"t have either Roger Federer, Andy Murray or Rafael Nadal in the semifinals. Top seed Novak Djokovic is the only representative of the Big Four left in the singles. That seems to put him back on track to win his third major of 2016. Or does it? Here"s what you need...