The reigning Wimbledon, Australian Open and U.S. Open champion made quick work of her Ukrainian opponent, avoiding the fate of older sister, Venus, a 1-6, 7-5, 6-4 loser to Kateryna Bondarenko, Alona's sister, in Tuesday's second round.
"I couldn't get my serve in and got frustrated (in the second set)," a somewhat disappointed Serena Williams told the Toronto Star. "I have to get to the final. I have to get there myself."
Also advancing Thursday were No. 4 Elena Dementieva, No. 14 Agnieszka Radwanska, Samantha Stosur, Lucie Safarova, a 7-6 (7-3), 6-4 winner over China's Jie Zheng; and Alisa Kleybanova, who knocked off top-seeded Dinara Safina on Wednesday.