Singer/actor Justin Timberlake (C) watches Rafael Nadal of Spain face Novak Djokovic of Serbia in the men's final match at the U.S. Open tennis championships in New York, September 9, 2013.(REUTERS)
Actor Leonardo Dicaprio (top, L) and Queen Sofia of Spain (lower, R) watch Rafael Nadal of Spain face Novak Djokovic of Serbia in the men's final match at the U.S. Open tennis championships in New York, September 9, 2013. (REUTERS)
Actors Alec Baldwin (bottom, R) and Sean Connery watch Rafael Nadal of Spain face Novak Djokovic of Serbia in the men's final match at the U.S. Open tennis championships in New York, September 9, 2013. (REUTERS)
Actors Alex Baldwin (R) and Sean Connery (C) chat as they watch Rafael Nadal of Spain face Novak Djokovic of Serbia in the men's final match at the U.S. Open tennis championships in New York, September 9, 2013. (REUTERS)
Actress Sarah Jessica Parker watches Serena Williams of the U.S. play Victoria Azarenka of Belarus during their women's singles final match at the U.S. Open tennis championships in New York September 8, 2013. (REUTERS)
Actress Jessica Alba watches Rafael Nadal of Spain face Novak Djokovic of Serbia in the men's final match at the U.S. Open tennis championships in New York, September 9, 2013. (REUTERS)
Jessica Alba (centre row second right), Amanda Seyfried (bottom row second right) and Justin Long (bottom row right) watch the men's singles final match between Novak Djokovic of Serbia and Rafael Nadal of Spain on Day Fifteen of the 2013 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2013 in the Flushing neighborhood of the Queens borough of New York City. (Getty Images/AFP)
Amanda Seyfried, left, and Justin Long, right, watch play between Rafael Nadal, of Spain, and Novak Djokovic, of Serbia, during the men's singles final of the 2013 U.S. Open tennis tournament, Monday, Sept. 9, 2013, in New York. (AP)