MONTREAL (AP) — Top-ranked Iga Swiatek of Poland beat 14th-seeded Karolina Muchova of the Czech Republic 6-1, 4-6, 6-4 on Thursday night in the National Bank Open in a match interrupted by rain for more than six hours.
Coming off her fourth victory of the year last week at home in Warsaw, Swiatek finished off Muchova after they were delayed for three hours, 20 minutes following the second set and for two hours, 50 minutes early in the third.
"You have to find energy even though we've been here since 9 a.m.," Swiatek said in her on-court interview. "For sure, it was a pretty extraordinary day, and I don't think I've had such a situation in my career so there is the opportunity to learn something new and see what I'm capable — even though we played this match like three times."
With the victory, Swiatek — who also beat Muchova in June in the French Open final — guaranteed she'll remain No. 1 for 72nd straight week when the new ranking comes out Monday. The 22-year-old player leads the tour with 49 match victories.
Swiatek set up a quarterfinal match against Danielle Collins. The American beat hometown favorite Leylah Fernandez 6-3, 6-3 in the final night match.