See more Toronto Sun on Google — save as a Preferred SourceThis advertisement has not loaded yet, but your article continues below. THIS CONTENT IS RESERVED FOR SUBSCRIBERS ONLYDiana Shnaider upset world number three Jessica Pegula 6-3, 6-3 on Saturday to reach the WTA Toronto Masters quarterfinals, where the 15th-seeded Russian will face Poland’s Iga Swiatek. Article contentThe 22-year-old left-hander took only 73 minutes to dispatch Pegula and improve to 3-3 in WTA career matches against top-five rivals. “I feel like this week I’ve been very comfortable on both defending and just firing some winners,” Shnaider said. Former world number one Swiatek, the seventh seed, rallied to defeat Ukraine’s 10th-seeded Marta Kostyuk 3-6, 6-1, 6-2.