Sloane Stephens believes she's changed a lot in the year since her Australian Open semifinal loss to Victoria Azarenka - a match that became clouded in controversy when the Belarussian took a medical timeout after wasting five match points, halting Stephens' momentum. Stephens said she doesn't get flustered as easily now and she's not overwhelmed by matches on the big stages. The second-seeded Azarenka and 13th-seeded Stephens set up a meeting in the fourth round at this year's Australian Open with straight-set wins on Saturday. Azarenka, the two-time defending champion, needed just an hour to dispatch Austrian Yvonne Meusburger 6-1, 6-0, while Stephens had a more challenging time in her 7-5, 6-4 win over Elina Svitolina of Ukraine. More...