As another US Open closes, it's time to reflect on who made the biggest breakthroughs and who failed to live up to expectations.
On the men's side, the "Big Four" secured the major titles, with Andy Murray capturing his first on a blustery Monday afternoon. The women's side saw breakthrough players such as Sara Errani and compatriot Roberta Vinici, as well as a very dominate Serena Williams, taking her 15th Grand Slam title in New York.
There were new comers such as Brian Baker and Sloane Stephens, and goodbyes to Andy Roddick and Kim Clijsters.
Then, there were players that came to the US Open to prove something and did just the opposite.
Here are five men and five women who took a step backwards in the final Slam of the season and have some work to do in the upcoming fall swing.