WHAT HAPPENED: No. 1 seeds Martina Hingis and Sania Mirza continued their 2015 dominance by winning the US Open women's doubles title without losing a set, easily prevailing in the championship match over No. 4 seeds Casey Dellacqua and Yaroslava Shvedova, 6-3, 6-3.

Hingis and Mirza were the first to strike in the match, breaking Dellacqua at love to take a 3-1 lead in the opening set, but Mirza dropped her serve in the next game with a forehand error. The top seeds responded brilliantly, breaking Shvedova in the next game when she hit a backhand lob wide. The top seeds made sure to hang on to their momentum this time, with Mirza striking a forehand passing shot on her serve at 5-3 to give them set point and Hingis hitting a volley winner to wrap up the opening set.

They continued their momentum in the second set by breaking Shvedova in the opening game. With Mirza's lethal forehand continuing to set up winning volleys for Hingis, the pair appeared unstoppable. And they were, continuing to roll by breaking Dellacqua to take a 5-2 lead. Hingis showed her first sign of all nerves all match in failing to serve out the championship, but she and Mirza rebounded by breaking Shvedova in the very next game.

A volley winner from Hingis on their first championship point wrapped up the match as she and Mirza jubiliantly hugged in celebraton.

"We just clicked from the very beginning and our games compliment each other so well," said Hingis. "Being back here and winning titles is just a bonus for me now."

WHAT IT MEANS: This is the second Grand Slam title that Hingis and Mirza have won as a team, having prevailed earlier this summer at Wimbledon. It also marks Hingis' first US Open women's doubles title since 1998 and her second trophy of the tournament, having won the mixed doubles title earlier this week with Leander Paes. Meanwhile, Mirza has become the first Indian woman to win the women's doubles title at the US Open. She won the US Open mixed doubles title last year with Bruno Soares.

The pair split $570,000 for their efforts and further solidified their gap between the other teams in the WTA rankings.

Dellacqua, meantime, is still looking for her first Grand Slam women's doubles title, with her record in the championship matches now dropping to 0-6. On the bright side, she and Shvedova will now move up to No. 5 and No. 7 in the WTA doubles rankings, respectively. They split $280,000  for reaching the final.

THE QUESTION: How many Grand Slam titles will Hingis and Mirza win together next year?