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				 Williams beat Sharapova, who is ranked number two, to claim 
				her 19th grand slam singles title in the Australian Open final 
				last month. 
				 
				Sharapova, who first earned the top spot as an 18-year-old in 
				2005, has not beaten Williams since 2004. 
				 
				"I wouldn't say it's as much of a priority as when I was 
				younger," Sharapova told Reuters on Sunday in a telephone 
				interview from the resort town of Acapulco ahead of the annual 
				Mexico Open. 
				 
				"She is definitely an opponent that I have had a lot of trouble 
				playing against in the last 10 years and someone that I would 
				love to beat," She said. 
				 
				"I love facing her and I love that challenge. I'm definitely not 
				shy of competing against her." 
				 
				Sharapova, who will be playing in the Mexico Open for the first 
				time, is the favorite to win against Italian Sara Errani, ranked 
				16th and America's 20th ranked Madison Keys in this week's 
				matches in Acapulco. 
				 
				"It's quite a tough deal. There are a lot of girls that have had 
				big wins, even some that are not seeded, so I look forward to 
				tough competition and of course being the number one seed," 
				Sharapova said. 
				 
				(Editing by Simon Gardner) 
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