Two-time champ Williams avenged a first-round loss by her sister, Venus, to Flipkens, beating the Belgian 6-0, 6-3 in a third round match in the $2.4 million tournament at the Rexall Centre stadium.

“After I won the first set I definitely thought about Venus, and I thought about what a good comeback Kirsten had, so I thought, I'm not going to get over-confident,” Williams said. “I was just trying to stay really focused as well as really intense at that moment.”