After a day of searingly-hot temperatures which raised complaints from players, top-seeded Rafael Nadal advanced to the second round of the Australian Open in relatively mild conditions. Nadal's Australian opponent Bernard Tomic, bothered from the start by a left leg injury, retired from the match after losing the first set 6-4. Roger Federer, Andy Murray and defending champion Victoria Azarenka advanced earlier Tuesday amid temperatures that topped 42 Celsius (108 Fahrenheit). Third-seeded Maria Sharapova joined them when she beat American Bethanie Mattek-Sands 6-3, 6-4 in the last match of the night. More...