Andy Murray needed little more than an hour to reach the quarter-finals in the singles of the Rogers Cup, just hours before losing in the doubles against his brother in Montreal.
Murray, playing for the third day in a row after defeating Tommy Robredo in a clash that was held over until Wednesday afternoon, made light work of Gilles Muller.
The 2009 and 2010 champion claimed a routine 6-3 6-2 victory in 65 minutes and will be back on court later on Thursday alongside Leander Paes against sibling Jamie and his doubles partner John Peers.
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Murray started sluggishly and found himself 0-40 down on serve in the opening game although the Scot battled back to hold as Muller wasted four break points.
The world number three, who will move up to second in the rankings if he reaches the final, took the initiative in the fourth game, breaking with a delightful lob.
Muller could not find a way back into the game as a rampant Murray made light of windy conditions to wrap up the first set inside 31 minutes.
It did not get any better for the Luxembourg left-hander as he dropped his serve without winning a point at the start of the second set and then again in the fifth game to gift Murray a 4-1 lead.
A mid-set lapse from Murray allowed Muller a route back in as he broke straight back, but three double faults from the world number 46 restored the two-break cushion for Murray, who then held to book a last-eight spot against either Jo-Wilfried Tsonga or Bernard Tomic.