Serena Williams attacked Maria Sharapova's strength and it helped extend her complete domination of their rivalry, earning the six-time Australian Open champion a place in the semifinals.<br />Top-ranked Williams beat Sharapova 6-4, 6-1 in the quarterfinals on Tuesday, her 18th consecutive victory and 19th in their 21 career meetings back to 2004.<br />"It was super intense," Williams said of the replay of last year's final.<br />"She's an incredibly intense, focused player who was No. 1 and has won so many Grand Slams for a reason.<br />You have to come out with a lot of fire and intensity."<br />Up next for her is fourth-seeded Agnieszka Radwanska, who beat No. 10 Carla Suarez Navarro 6-1, 6-3 to reach a Grand Slam semifinal for the fifth time.
