Three different men and three different women have won singles titles in the year's first three Grand Slam events, leaving a range of top contenders for the 2013 U.S. Open.
The Big Four of men's tennis seems to have been reduced to the Big Three, any of whom could win the U.S. Open, while two players are considered the favorites to claim the women's title.
The withdrawal of Maria Sharapova changes the women's outlook, but only slightly.
If you are looking for long shots, consider Jerzy Janowicz, Milos Raonic, Grigor Dimitrov or Kevin Anderson among the men and Wimbledon runner-up Sabine Lisicki, Laura Robson, Venus Williams or Madison Keys among the women.
The prime contenders reside in a group of seven men and seven women. We will count down to the male and female players most likely to win the U.S. Open singles titles, with each player accompanied by his or her odds of winning the tournament and a prediction.