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			 The former world number one has been plagued by injuries in the last 
			two years which have sent her down to 22nd in the world rankings but 
			showed little signs of rust against qualifier Vesnina. 
			 
			Playing for the first time since retiring from the WTA event in 
			Wuhan, China in September, Azarenka broke Vesnina six times to wrap 
			up victory. 
			 
			She will have a much sterner test against former French Open 
			finalist Halep, who had a first-round bye. 
			 
			Australian Sam Stosur had a much difficult match and narrowly 
			avoided disappointment on home turf by battling through a wrist 
			injury to claim an opening victory. 
			  
			  
			 
			The former U.S. Open champion recovered from 0-3 down in the final 
			set to beat Slovakian qualifier Jana Cepelova 6-4 3-6 6-4 to start 
			her year. 
			 
			The 31-year-old has frequently failed to hit the heights on home 
			turf having never won a tournament or progressed past the fourth 
			round at the Australian Open. 
			 
			The world number 27 looked set for another disappointment before a 
			spirited effort saw off the world number 147 and set up a 
			second-round clash with Spain's Carla Suarez Navarro. 
			 
			"I am really pleased to walk away with a win, especially being down 
			in that third set and then find that ability to come back and play 
			well and win it when you are down, to turn things around," Stosur 
			said. 
			 
			
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			Italy's Roberto Vinci, who ended Serena Williams's bid for a 
			calendar grand slam in the U.S. Open semi-finals last year, beat 
			former world number one Jelena Jankovic 3-6 6-2 6-4. 
			 
			Russian Maria Sharapova is the tournament draw card and she will 
			kick off her campaign on Tuesday against compatriot Ekaterina 
			Makarova. On the men's side, 17-times grand slam champion Roger 
			Federer will play Germany's Tobias Kamke. 
			 
			Bulgarian Grigor Dimitrov, who has slumped from eighth to 28th in 
			the rankings, started the year with a 6-3 7-6(10) win over fifth 
			seed Gilles Simon of France. 
			 
			(Writing by Patrick Johnston and Sudipto Ganguly; editing by Ed 
			Osmond) 
			
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