Caroline Wozniacki has defeated world No.1 Karolina Pliskova in a marathon Rogers Cup quarter-final match in Toronto, marred by four rain delays on Friday.
The 7-5 6-7 (3-7) 6-4 win arrived after the delays, which all came during the first set, appeared to boost the sixth-seeded Dane.
Trailing 3-0 when the match was interrupted, Wozniacki appeared relaxed during the breaks.
They gave her time to consult with her father and longtime coach Piotr Wozniacki, before she won five straight games and ultimately took the first set.
"Almost every tournament I've played this year there has been a rain delay so at this point I just have to laugh because I feel like it is following me," she said during a courtside interview after the 3 hour 26 minute match.
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"Every time this year when it has been raining I've had a great tournament, so I thought this must be luck."
The delays and Wozniacki's solid all-around game appeared to throw off the big-serving Pliskova, who was playing in her first tournament since becoming the top ranked player.
The victory marks Wozniacki's first career win against a world No.1 and gives the 27-year-old a 6-2 advantage in head-to-head matches with Pliskova.
Wozniacki will face unseeded American Sloane Stephens in the semi-finals after she overwhelmed Czech Lucie Safarova 6-2 1-6 7-5.
The remaining two quarter-finals will be decided on Saturday.
Fourth-seeded Spaniard Garbine Muguruza is one set up against Elina Svitolina of Ukraine, winning the opener 6-4 before the day's play was ended by rain.
Simona Halep was yet to start her match against Caroline Garcia.
