Novak Djokovic beat long-time rival Roger Federer over four enthralling sets to win his second U.S. Open and 10th grand slam title on Sunday at the Arthur Ashe Stadium in New York, according to BBC Sports.

Djokovic won 6-4 5-7 6-4 6-4, winning the Serbian three out of four grand slam titles this year, with a loss against Stan Wawrinka in the French Open final his only blemish.

"It's been an incredible season. Next to 2011 probably the best season of my life," said Djokovic, who won the same three major titles in 2011. "But I'm enjoying this year more than any previous one because I'm a husband and I'm a father and that makes it even more sweeter."

"I love this sport," he added, according to Reuters.

Federer, was looking to win his 18th Grand Slam title and his first for three years and looked to have a real chance in the third set, but world number one Djokovic broke Federer's serve six times and saved 19 out of 23 break points as he fought his way to a 27th win in 28 Grand Slam matches this year.

The match was delayed by three hours due to rain, and finally started at about 7.15 p.m. local time. Federer and Djokovic, who were meeting for the 42nd time, were slow to find their rhythm and footing, particularly Djokovic, who fell in the opening set, badly scraping his arm and leg.

But the unflustered Djokovic quickly got back into the game, regaining his composure and balance. Federer, who broke just twice during the entire tournament, faced three break points but was able to save all three. The Swiss, however could not defend against three other break chances on his next service game as Djokovic broke the deadlock to go up 2-1.

Federer broke back instantly but his Serbian rival managed to regain the advantage with another break to lead 4-3 before he held serve to win the opening set against a nervous Federer.

The highlight of the second set was an intense 15-minute 10th game which saw both players held level at 5-5. But Federer came out as a winner, ending the set with a crosscourt shot that brought the audience to its feet.

Federer suddenly lost focus and sensing the same, Djokovic claimed the crucial break at 5-4 to regain control.

The Serbian kept pressing with a break to open the fourth and then again to lead 5-2 coming one step closer to winning the title, but Federer was not going give up easily, digging into his reserves he would break and hold serve to reduce the difference to 5-4 in a nail-biting match.

When Djokovic started serving again, Federer gained three more break chances, but Djokovic came out on top to clinch the U.S. Open title as Federer's return sailed long.