Toronto (Canada) (AFP) - Caroline Wozniacki survived three rain delays to book her spot in the WTA Toronto tournament semi-final with a marathon 7-5, 6-7 (3/7), 6-4 victory over world No. 1 Karolina Pliskova on Friday.
The sixth seeded Wozniacki posted her first career win over a number-one player in seven tries as she blasted eight aces in the two-hour, 56-minute centre court match.
Wozniacki's record against number ones included five losses to Serena Williams and one to Dinara Safina.
She next faces either Czech Lucie Safarova or American Sloane Stephens.
Pliskova fired five aces but won just 45 percent of her second-serve points.