TORONTO — Serena Williams took another step toward her fourth Rogers Cup title after dispatching Andrea Petkovic 6-3 6-2 on Thursday to advance to the quarter-finals.
Williams, who won the title in 2001, 2011 and 2013, dominated on service and blasted nine aces in a match that lasted just over an hour.
"I think I served better. That was the big difference," Williams told reporters. I still think I have a tremendous amount of improvement to do off the ground and everywhere else."
Williams will now take on Roberta Vinci of Italy, who beat Daria Gavrilova 6-4 6-3.