NEW YORK, NY, USA - Former WTA World No.1 and Hall of Famer Martina Hingis has the opportunity to add to her Grand Slam haul in both women's and mixed doubles at the US Open, partnering Chan Yung-Jan to beat No.4 seeds Sania Mirza and Peng Shuai, 6-4, 6-4 and later edging past CoCo Vandeweghe and Horia Tecau, 6-4, 7-6(8) with Jamie Murray.
Hingis has won four US Open titles in singles, doubles, and mixed, and is fresh off her 23rd major title overall at Wimbledon in mixed doubles with Murray.
Meanwhile, the Swiss star has dominated the doubles circuit in 2017 with Chan, winning six titles and qualifying for the BNP Paribas WTA Finals Singapore presented by SC Global. Starting the day in women's doubles, she edged past former partner Mirza and Peng in just under 90 minutes, hitting a whopping 44 winners to just 22 unforced errors.
In between Hingis' mixed switch, Lucie Hradecka and Katerina Siniakova scored the upset over fellow Czechs and No.3 seeds Lucie Safarova and Barbora Strycova, 6-2, 7-5.
"It was a tough one," Hradecka said. "It's never easy in the semis or even the first round to play fellow Czechs. But I think we're happy to make it through in two sets because the second set we lost momentum. Maybe that was my mistake because I called the physio after the first set. That might have made us less awake and caused a few mistakes."
Hradecka and Siniakova started the season with an impressive run to the BNP Paribas Open final, but trailed 1-4 in the second set on Friday before regrouping with the help of some solid volleys from Siniakova.
"It was so windy, and we missed a few volleys, and some of them were so close to the net that I didn't want to touch the net and lose the point! But in the end, we made more winners than mistakes."
Hingis and Chan beat the Czechs in that aforementioned Indian Wells final, leaving the pair eager for revenge.
"It will be a tough match, but we know each other and we've played well in all the matches we've played against them. We might not have finished them as well, so I think we'll be even more hungry to win on Sunday."