At the U.S. Open Tennis tonight, the top-seeded Indo-Swiss pair of Sania and Martina Hingis is scheduled to take on Swiss Timea Bacsinszky and her Taipei partner Chia-Jung Chuang in the second round of women's doubles.In the Mixed Doubles, Leander Paes and Rohan Bopanna will be seen in action with their respective partners.Yesterday, Mixed doubles defending champions Sania and Bruno Soares lost 3-6, 3-6 to Czech Republic's Andrea Hlavackova-Lukasz Kubot in a first round contest. Earlier, Leander Paes and Fernando Verdasco lost their second round match in the men's doubles competition.