Maria Sharapova vowed Saturday to keep grinding away to break her jinx against Serena Williams, after she was beaten to the Australian Open title by a player who has won all 16 of their last encounters. Williams' powerful serve made the difference on Saturday, with the 33-year-old blasting 18 aces to win her 19th Grand Slam 6-3, 7-6 (7/5) and consolidate her place among the game's legends. Coming into the tournament the Russian also had the chance to topple Williams as world number one, but the opportunity also slipped from her grasp.