Paris: Serena Williams has bolstered her position atop the WTA world rankings after winning the Australian Open on Saturday. The 33-year-old American defeated Maria Sharapova in straight sets for her sixth Grand Slam title in Melbourne and 19th in all.


Serena Williams . Pic/Santa Banta 

Williams is over 1,500 points clear of the Russian who in turn is well ahead of third placed Simona Halep of Romania. One of the biggest movers of the week was Serena's older sister Venus.