Wawrinka, who beat fellow Swiss Roger Federer in last year's final, put up only token resistance as his game fell apart in a 6-1 6-2 rout on Centre Court.

Dimitrov will face the winner of the following match on court between Federer and French showman Gael Monfils in the quarter-finals.

Later on Thursday eight-rimes Monte Carlo champion Rafa Nadal takes on American John Isner and world number one Novak Djokovic is up against unseeded Austrian Andreas Haider-Maurer.

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