Indo-Romanian pair of Rohan Bopanna and Florin Mergea lost their quarterfinal clash against Dominic Inglot and Robert Lindstedt 6-7, 3-6 on Wednesday.The sixth seeded pair came close to winning the first set, but lost the tiebreaker 2-7. They were comfortably outplayed in the second set by their opponents.Bopanna and Mergea had five break point opportunities, but the duo failed to win even one of them.Meanwhile, Bopanna and his mixed doubles partner Yung-Jan Chan will be taking on Indo-Swiss pair of Leander Paes and Martina Hingis for a spot in the final. The second seeded Bopanna-Chan pair faced a tough battle in the quarterfinal against Su-Wei Hsieh and Henri Kontinen, whereas the fourth-seeded pair of Paes and Hingis moved into the final-four after getting a walkover from the Romanian pair of Simona Halep and Horia Tecau.Also read: US Open – Game, set and match! Federer storms into quarter-final Indo-Swiss pair of Sania Mirza and Martina Hingis will be battling for a berth in the final against Italy’s Sara Errani and Flavia Pennetta. Martina and Sania defeated ninth seeds Yung-Jan Chan and Hao-Ching Chan of Chinese Taipei to reach US Open semifinal on Wednesday.Top-seeded Serb Novak Djokovic made it to US Open semifinals for the ninth consecutive time on Wednesday when he defeated 18th-seeded Feliciano Lopez 6-1, 3-6, 6-3, 7-6. On Friday, Djokovic will take on defending champion Marin Cilic, who battled past Frenchman Jo-Wilfried Tsonga.Second-seeded Swiss Roger Federer will take on 12th seed Richard Gasquet in quarterfinal clash on Thursday morning. Federer who was unfazed in his previous matches is expected to ease past the Frenchman.advertisementAlso read: Paes, Bopanna set to face off in mixed doubles semis Stanislas Wawrinka, who has had a good run in recent majors, will look to continue his record when he battles for a semifinal spot against South Africa’s Kevin Anderson. The fifteenth-seeded Anderson knocked Briton Andy Murray out of US Open in the fourth round clash. Murray succumbed against the big-serving South African, thereby failing to maintain his record of 18 consecutive grand-slam appearances.Serena battles past her sisterWednesday saw an intense quarterfinal battle between Williams’ sisters. Serena maintained her dream run in grand slams by beating her older sister 6-2, 1-6, 6-3. It was an ace, a hug, game set and match for Serena. Venus came from behind in the second set, but failed to withstand Serena’s push in the final set.