Djokovic beats Nadal to win first U.S. Open title

Djokovic improved to 64-2 with 10 tournament titles in a simply spectacular year, one of the greatest in the history of men's tennis -- or any sport, for that matter.

"I've had an amazing year," Djokovic said, "and it keeps going."

Against No. 2 Nadal, Djokovic is 6-0, all in finals -- three on hard courts, including Monday; two on clay; and one on grass at Wimbledon in July. Djokovic also won the Australian Open in January, and is only the sixth man in the 40-plus years of the Open era to collect three major titles in a single season.

"Obviously I'm disappointed, but you know what this guy is doing is unbelievable," Nadal said.

Addressing Djokovic, Nadal added: "What you did this year is impossible to repeat, so well done."