ranking points to defend and Li Na failing to defend her finalist points from the Australian Open. Stosur then traveled to Fribourg to represent Australia in their Fed Cup tie against Switzerland. She won both of her singles rubbers against Timea Bacsinszky and Stefanie Vögele. Stosur then competed at the Qatar Open in Doha. She was seeded third and avenged her loss in the first round of the Australian Open by defeating Sorana Cîrstea in the second round; she eventually lost in the final to current world No. 1, Victoria Azarenka, who had not lost a match (17–0) to that point in 2012. Her second Middle-East tournament was the Dubai Championships, where she defeated Lucie Šafářová in the second round in three sets, but for the second straight year she lost to former world No. 1, Jelena Janković. Stosur then traveled to the United States to compete in the Indian Wells Open, where she defeated young American Irina Falconi, to make the third round, where she lost a very tough match to Nadia Petrova. Then at the Miami Open, Stosur made the quarterfinals after a big comeback from a set and 2–5 down to defeat Chanelle Scheepers. Serena Williams got revenge on Stosur for the 2011 US Open final by defeating her in straight sets. At the Family Circle Cup in Charleston, Stosur entered the tournament as second seed and had a first-round bye. She defeated wildcard Jamie Hampton in the second round and Galina Voskoboeva in the third round. In the quarterfinals, Stosur defeated Venus Williams for the first time after losing to her in the previous four encounters. However, Stosur's run ended in the semifinals, where she lost to eventual champion Serena Williams. After this, Stosur made her way to Stuttgart, where she won both her singles matches against Germany in the World Group Play-offs. She defeated two top-20 players, Angelique Kerber, the same player who Stosur faced in the 2011 US Open semifinal, and Andrea Petkovic, for their first encounter. At the Porsche Tennis Grand Prix, Stosur reached the quarterfinals by defeating the defending champion Julia Görges in three sets. She lost in the quarterfinals to Maria Sharapova, despite holding a match point in the second set. She next played at the Madrid Open, defeated Petra Martić in a third set tiebreak and Christina McHale in the first two rounds on the blue clay courts. Stosur's third-round