Angelique Kerber loses to Daria Gavrilova in Hong Kong quarter-finals
World number one Angelique Kerber was beaten in the quarter-finals of the Hong Kong Open by Australia's Daria Gavrilova.
The German, who went out of last week's China Open at the last-16 stage, lost 6-3 6-1 in an hour and 14 minutes against the world number 38.
Kerber, 28, struggled with her serve and hit six double faults.
Gavrilova, 22 and yet to win a WTA singles title, faces France's Kristina Mladenovic in Saturday's semi-finals.