Serena Williams and Maria Sharapova will battle it out for the world number one ranking when they meet in the Madrid Open final on Sunday after both came through Saturday's semi-finals in straight sets.
American player Serena Williams returns the ball to Italian player Sara Errani during their women's singles semi-final tennis match at the Madrid Masters at the Magic Box (Caja Magica) sports complex in Madrid on May 11, 2013. Williams won the match 7-5, 6-2.
Current number one, and defending champion, Williams sealed her place in the final as she overcame seventh seed Sara Errani 7-5, 6-2.
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