$ 0 0 Ice-cool top seed Serena Williams stayed on track for her sixth AustralianOpen title Wednesday with a straight-sets demolition of Serbia's Vesna Dolonc. The world number one raced through the match in oven-like conditions on Rod Laver Arena to make the third round with a dominant 6-1, 6-2 display in just 63 minutes. The victory was yet another landmark for the American veteran, who is gunning to match the achievement of Chris Evert and Martina Navratilova in winning her 18th Grand Slam. In beating Dolonc, she drew level with Margaret Court's record in winning her 60th match at the AustralianOpen. Williams has now played 68 times at Melbourne Park, with only Lindsay Davenport on 69 having graced the court more in the Open era.