New York: India's tennis queen Sania Mirza remained on course for her second successive Grand Slam title after reaching the semifinals of the US Open with Swiss partner Martina Hingis, here.

Top seeds Sania and Hingis, the Wimbledon champions, saw off the challenge of Taipei girls Yung-Jan Chan and Hao-Ching Chan 7-6(5) 6-1 in the quarterfinals of the last Grand Slam tournament of the season.