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				 The last time Djokovic and Federer played 
				successive matches on tennis' most famous stage, fans were left 
				short changed as both of their first-round opponents quit midway 
				through the second set with injuries. 
				 
				Latvia's Ernests Gulbis, once a top 10 player but now ranked 
				589th, and Germany's Mischa Zverev are unlikely to disappear 
				quite as easily however, and are likely to pose the first real 
				tests to Djokovic and seven-times champion Federer. 
				 
				Women's top seed Angelique Kerber has been finding her 
				grasscourt feet following her struggles in the first half of the 
				season and will be hoping to continue her resurgence against 
				American Shelby Rogers. 
				 
				Agnieszka Radwanska, runner-up here in 2012, will open Centre 
				Court proceedings against Swiss Timea Bacsinszky. 
				 
				Frenchman Jo-Wilfried Tsonga will be back to complete the fifth 
				set of his encounter against Djokovic's 2016 conqueror Sam 
				Querrey. 
				 
				(Reporting by Pritha Sarkar, editing by Peter Rutherford) 
			[© 2017 Thomson Reuters. All rights 
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