Unseeded Katie Boulter of England capped a run of upsets to win the San Diego Open singles title with a 5-7, 6-2, 6-2 victory over sixth-seeded Marta Kostyuk of Ukraine on Sunday.
A 10-year tour veteran, the 27-year-old Boulter won her second pro singles title with her fifth straight victory over higher-seeded players in the week-long WTA 500 event.
“I can’t stop smiling,” Boulter said. “I’ve been wanting this my whole career and now I’ve got to move my goalposts and keep it going.”
