At the French Open Tennis in Paris today, Indian ace Sania Mirza and her Swiss partner Martina Hingis crashed out of the women's doubles after being upstaged in straight sets by Bethanie Mattek-Sands and Lucie Safarova in the quarterfinal match. Top seeds and hot favorites, Sania and Martina went down to the seventh seeded American-Czech pair 5-7 2-6 in the Grand Slam event. With this defeat, India's campaign in the main draw of the French Open is over. Meanwhile, the women's Singles semi-final line up was completed with the entry of top seeded American Serena Williams and T.Bacsinszky of Switzerland into the last four stage today. In the two quarter-finals of the day, while 19-time Grand Slam champion Serena defeated 17th seeded Sara Irrani of Italy in straight sets 6-1, 6-3, Bacsinszky also overcame her Belgium rival A Van Uytvanck in straight sets 6-4, 7-5. In the semi-finals, while Serena will take on Bacsinszky, Ana Ivanovic of Serbia will face Lucie Safarova of the Czech Republic.