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British number 1 Katie Boulter reached nan 2nd information of nan Canadian Open arsenic compatriot Harriet Dart was knocked out.
Boulter won 6-4 3-6 6-1 against American Bernarda Pera, who is classed 80 successful nan world, astatine Sobeys Stadium successful Toronto.
On Thursday she will meet Brazilian world number 22 Beatriz Haddad Maia, whom she hit connected nan measurement to winning nan San Diego Open successful March.
British number 3 Dart went down 3-6 6-3 6-7 (2-7) to Russia's world number 24 Diana Shnaider.
Dart earned a spot successful nan main tie arsenic a fortunate loser, having been taken disconnected successful a wheelchair erstwhile she retired pinch cramp successful qualifying connected Monday.
Shnaider will play Poland's Magdalena Frech successful nan 2nd round.
American erstwhile world number 1 Naomi Osaka hit Tunisia's ninth seed Ons Jabeur 6-3 6-1, her 5th triumph complete a top-20 force this twelvemonth pursuing her return from maternity leave.