Sevastova, the world number 386 from Latvia, snapped fourth-ranked Pegula's 11-match WTA Canada win streak, the longest since Serena Williams reeled off 14 consecutive wins in 2011, 2013 and 2014. Sevastova, 35 won the most recent of her four career WTA titles at the 2019 Baltic Open in her homeland.

Anastasija Sevastova saved nine of 13 break points on Friday while recording a 3-6, 6-4, 6-1 victory over two-time defending champion Jessica Pegula in the third round of the National Bank Open in Montreal on Friday.