Australian Open champion Wozniacki beaten by Kasatkina

Daria Kasatkina shocked Caroline Wozniacki to knock the Australian Open champion out of the St Petersburg Ladies' Trophy.

World number one Wozniacki, who won her first Grand Slam title in Melbourne last month, was ousted in straight sets as eighth seed Kasatkina claimed a 7-6 (7/2) 6-3 win on Friday.