Top-seeded Aryna Sabalenka powers her way into the quarterfinals at the Australian Open

MELBOURNE, Australia (AP) — First-seeded Aryna Sabalenka, attempting to win her third Australian Open title in four years, reached the quarterfinals on Sunday with a victory over No. 17 Victoria Mboko of Canada 6-1, 7-6 (1).

Sabalenka, using a high-powered serve that produced three aces in the first set, rolled over the 19-year-old Canadian in just 31 minutes.

Sabalenka was not quite as dominant in the second set — producing a few more unforced errors — against Mboko, who played...