| Wawrinka, making his first return to the site 
				of his 2016 triumph since undergoing knee surgery, showed he was 
				still shaking off the ring rust despite encouraging victories in 
				the first two rounds.
 The first set went down to the wire with nothing to choose 
				between the two rivals, neither of whom were unduly troubled on 
				serve.
 
 Raonic lost the first three points of the tiebreak before 
				recovering to level at 3-3 and showed great strength of 
				character to save two set points before going on to claim the 
				opener.
 
 "It was tough," the Canadian said in an on-court interview. "I 
				was fortunate I got through that because I was falling behind in 
				that tiebreak."
 
 Wawrinka, who had won four of his five previous matches against 
				Raonic, could not match his opponent's intensity in the final 
				two sets and paid the price for some poor shot selection.
 
 The 33-year-old is one of the best all-court players on the 
				men's circuit and his one-handed backhand is matched only by 
				that of his compatriot Roger Federer in terms of elegance.
 
 It let him down repeatedly on Friday, though, as Raonic, sensing 
				a weakness, targeted that side and duly prospered.
 
 The Canadian serve-and-volley specialist made sure he stayed on 
				the front foot throughout, firing down 14 aces to Wawrinka's 
				four and coming to the net behind his booming serve 37 times 
				with a success rate of 73 percent.
 
 "I've got to just keep getting sharper," added Raonic, who is 
				seeded 25th. "I've got to find a way to get ahead a little 
				earlier in the points and not get too defensive.
 
 "If I can play on my terms I can compete against anybody."
 
 Next up for the 27-year-old is a last-16 clash with American 
				John Isner, the 11th seed, who beat Serbian Dusan Lajovic 
				earlier in the day.
 
 (Reporting by Simon Jennings, editing by Nick Mulvenney)
 
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