Serena Williams made a ruthless start to her quest for a record-equalling 24th Grand Slam singles title with a 6-0 6-2 victory over unseeded German Tatjana Maria in the first round of the Australian Open on Tuesday. Playing her first Grand Slam since her infamous rant against the umpire at last year's U.S. Open final, the 37-year-old Williams seemed to have decided to move on from last September's incident that caused a furore across the world.