Novak Djokovic of Serbia poses with the trophy after winning the US Open. This marks Djokovic's third Slam title this year as he won the Australian Open in January and Wimbledon in July.
 

Rafael Nadal lost to Novak Djokovic for the sixth tim this year. He has yet to win against the No. 1 player in 2011.

Novak Djokovic of Serbia meets Rafael Nadal of Spain at the net after the men's championship match. Djokovic won the match 6-2, 6-4, 6-7(3), 6-1 to win his first US Open title.
 

Novak Djokovic of Serbia reacts after winning the US Open men's singles title. Djokovic has won three majors this year and has only lost two matches the entire year for an epic run.
 

Rafael Nadal of Spain, right, chases down a ball hit by Novak Djokovic of Serbia during the fourth set of the men's championship match at the US Open.

A trainer works on Novak Djokovic of Serbia during a medical timeout in the fourth set for a back strain. Djokovic received treatment and went on to win the set and the match for his first US Open title.
 

Actor Chris Pine and his father actor Robert Pine watch Rafael Nadal of Spain play against Novak Djokovic of Serbia during the US Open men's final.

No. 1 Novak Djokovic of Serbia sits in his chair after losing the third set to No. 2 seed Rafael Nadal of Spain. Djokovic won the first two sets, but Nadal forced and won a third-set tiebreak.

Rafael Nadal of Spain reacts during the championship match against Novak Djokovic of Serbia after winning the third set in a tiebreak. Djokovic won the first two sets.
 

A frustrated Novak Djokovic of Serbia tosses his racket during the men's championship match against Rafael Nadal.

Rafael Nadal of Spain reacts during the championship match against Novak Djokovic of Serbia. Nadal lost the first two sets 6-2, 6-4.

Tennis fans watch the men's championship match between Novak Djokovic of Serbia and Rafael Nadal of Spain as the sun sets over the New York skyline at the U.S. Open tennis tournament in New York, Monday, Sept. 12, 2011. (AP Photo/Charlie Riedel)

CBS tennis analysts John McEnroe and Dick Enberg look on from the announcer's booth as they call the match between Rafael Nadal of Spain and Novak Djokovic of Serbia. It has been announced that this will be Enberg's last time calling the US Open telecast.

Novak Djokovic of Serbia returns a shot to Rafael Nadal of Spain during the men's championship match at the US Open. Djokovic won the first two sets 6-2, 6-4.
 

Rafael Nadal of Spain reacts during the third set against Novak Djokovic. Defending champion Nadal lost the first two sets in the men's US Open final.
 

Rafael Nadal of Spain has a word with the chair umpire.

Novak Djokovic of Serbia reacts during the second set against Rafael Nadal of Spain. Djokovic went on to win the second set to take a two sets to none lead.

Recording artists Jay-Z and Beyonce share a laugh while watching Rafael Nadal of Spain and Novak Djokovic of Serbia play.

NASCAR driver Jimmie Johnson and his wife Chandra sit behind actor Stanley Tucci as they watch Rafael Nadal of Spain play against Novak Djokovic of Serbia.

Actors Christine Taylor, John Lithgow, Ben Stiller and Owen Wilson watch Rafael Nadal of Spain play against Novak Djokovic of Serbia.

An animated Novak Djokovic of Serbia reacts during the men's championship match against Rafael Nadal of Spain.

Rafael Nadal of Spain stretches to return a shot to Novak Djokovic of Serbia during the men's championship match at the US Open. The first set took 53 minutes to play 8 games with Djokovic taking the set 6-2.

Novak Djokovic of Serbia serves against Rafael Nadal of Spain. Nadal will try and defend his 2010 US Open title while Djokovic seeks his third Slam title of the year.

Rafael Nadal of Spain serves against Novak Djokovic of Serbia during their match. Nadal went up early in the first set with a 2-0 lead, but Djokovic won 6 straight games to win the set.

Jelena Ristic cheers on boyfriend Novak Djokovic of Serbia during his match against Rafael Nadal of Spain in the US Open men's final. Djokovic has beaten Nadal 5 times this year and has won two Slam titles.

From left to right, Rafael Nadal's girlfriend Maria Francisca Perello, his sister Isabel Nadal and mother Ana María Parera look on from the stands prior to Nadal playing against Novak Djokovic of Serbia.

Legendary songwriter Paul Simon waits for the start of the men's championship match between Rafael Nadal of Spain and Novak Djokovic of Serbia.

Rafael Nadal of Spain looks a bit more serious than his opponent, No. 1 Novak Djokovic of Serbia before their US Open final match.

Novak Djokovic of Serbia pays tribute to the 10th anniversary of 9/11 by wearing an FDNY cap as he waits for the start of the men's championship match against Rafael Nadal.