Andy Murray eased into the quarterfinals of the Rogers Cup with a straight sets victory over Gilles Muller in Montreal.
The Scot was forced to save four break points in his opening service game but took control to win 6-3 6-2, and next faces Bernard Tomic or Jo-Wilfried Tsonga.
"Washington was disappointing and it's been a tough couple of long days with rain delays and late finishes, so it was nice to get out here and play a solid match without too much drama," said Murray.
"Getting matches is the most important thing right now, hopefully I can get a few more."
Murray faces his older brother for the first time in his professional career later on Thursday, partnering Leander Paes against Jamie and John Peers in the men's doubles.
Earlier, world No.1 Novak Djokovic brushed aside Jack Sock 6-2 6-1 to reach the last eight.
Djokovic took only 54 minutes to finish off the 35th-ranked Sock.
"I never played him before, so it took me some time to figure out what his patterns are," Djokovic said. "I've watched him many times before, but it's different standing on the court."
The Serb, the tournament champion in 2007, 2011 and 2012, has won 50 of 53 matches this year. Djokovic will face Latvia's Ernests Gulbis in the quarterfinals. Gulbis beat American Donald Young 6-4 6-4.
Nick Kyrgios tumbled out, falling to John Isner a day after insulting French Open champion Stan Wawrinka during a match.
The 16th-seeded Isner beat Kyrgios 7-5 6-3 in the third-round match.
On Wednesday night, a courtside microphone picked up Kyrgios saying that fellow Australian player Thanasi Kokkinakis had slept with a player who is reportedly Wawrinka's girlfriend.
The ATP fined Kyrgios $10,000 on Thursday, the maximum fine allowed by the ATP rule book for incidents of verbal abuse or unsportsmanlike conduct.
Also, the ATP fined Kyrgios an additional $2,500 for unsportsmanlike conduct related to a comment made to a ball person during the match. The tour said Kyrgios has been served with a "Notice of Investigation," which begins a process to determine if his actions also merit further sanctions.
Seventh-seeded Rafael Nadal beat Mikhail Youzhny 6-3 6-3 in a night match. In other late matches, fourth-seeded Kei Nishikori topped 13th-seeded David Goffin 6-4 6-4, and 10th-seeded defending champion Jo-Wilfried Tsonga beat Australia's Bernard Tomic 7-6(7) 6-3.
Nadal will face Nishikori in the last eight, Murray will meet Tsonga, and Isner will play France's Jeremy Chardy, who beat Croatia's Ivo Karlovic 4-6 7-6(1) 6-4.