Serena Williams will gun for her 10th Grand Slam title and the world number one ranking against Dinara Safina in the Australian Open final after they both came through tough clashes on Thursday. With the roof of the Rod Laver Arena closed as temperatures soared to a sweltering 44.3 C (111.7 F), Williams is hitting form at the right time as she ended Elena Dementieva's 15-match winning streak 6-3, 6-4. The American second seed, who has won the title here three times, threw off the service problems that have dogged her throughout the tournament for a convincing victory to set up a Safina showdown.