Tennis News: How Nadal, Federer, Djokovic And Murray Fared In 2014; Report Cards For Men's Big 4

The past year has seen plenty of surprises on the ATP Tour. The Grand Slam calendar began with Stan Wawrinka stunningly winning his first major at the Australian Open and ended with an even more unlikely winner, Marin Cilic, lifting the U.S. Open trophy aloft.