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Wozniacki battles through

Caroline Wozniacki battled to a three-set win over Karolina Pliskova to reach the semi-finals of the Istanbul Cup.

The Danish top seed, who is yet to reach a WTA Tour final this season, won 6-1 3-6 6-2 and next meets France's Kristina Mladenovic, a 3-6 6-3 7-5 winner over former French Open champion Francesca Schiavone on Friday.

Croatian youngster Ana Konjuh continued her excellent week with a 6-4 1-6 6-1 victory over fourth seed and fellow teenager Elina Svitolina.

Sixteen-year-old Konjuh was playing in her first WTA quarter-final, and in her maiden semi-final she will face second seed Roberta Vinci, who thumped sixth seed Kurumi Nara 6-0 6-2.