Wozniacki keeps her cool to beat 16-year-old Croat

Wimbledon debutante Konjuh, the youngest player to reach the last 32 at the All England Club since 2005, forced Wozniacki on the backfoot for much of the first set, combining punchy hitting with deft touches at the net.

The world No.189 hit 19 winners compared to the Dane's nine, but Wozniacki broke Konjuh's spirit by winning nine games on the trot from 3-3 to seal a place in the second week of the grasscourt major for the fourth time.

The 16th seed will play either Australian Open champion Li Na or Czech Barbora Zahlavova Strycova on Monday she bids to reach the quarter-finals for first time.