The French Open champion has impressed in the opening week of the year’s third Grand Slam event, and he had little trouble in disposing of the unseeded Verdasco.
Wawrinka, seeded four, has won all nine sets in his three matches so far, but will face his toughest test in the last-16 when he comes up against Belgium’s David Goffin.
The improving Goffin, who beat Britain’s Liam Broady in round two and is seeded 16th, was impressive in making it past Wimbledon favourite Marcos Baghdatis of Cyprus, winning 6-3 6-4 6-2.
There was a shock of sorts when 11th seeded??Grigor Dimitrov, conqueror of Andy Murray in last season’s quarter-finals, went out to 21st seed Richard Gasquet in straight sets, 6-3 6-4 6-4.
Gasquet is always a danger on grass, but his record against Dimitrov made the result less of a surprise as he improved to 5-0 in his meetings with the Bulgarian.
And another top-10 player saw his bid for glory come unstuck in the last-32, with big-serving seventh seed Milos Raonic suffering a 5-7 7-5 7-6 (7-3) 6-3 defeat at the hands of young Australian sensation Nick Kyrgios.
Kyrgios fired down 34 aces against his Canadian opponent, battling back from dropping the first set on a game when he served three double-faults.
But he settled down and showed off his undoubted talent over the rest of an exciting match to set up an intriguing last-16 clash with the wily Gasquet.
“I don’t fear anyone,” Kyrgios said. “I thought I returned really well??today. I created a lot of chances. I knew it was going to be a tough match and I??toughed it out and got it done in four sets.”
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