Kiki Bertens on course for hat-trick, Sam Stosur’s reign over

Two-time defending champion Kiki Bertens reached the quarter-final of the Nuremberg Cup, but Strasbourg Open defending champion Sam Stosur crashed out.

Bertens came from a set down to beat Mona Barthel from Germany 6-7 (2-7), 6-2, 6-4.

The Dutchwoman will face Kirsten Flipkens, who beat Nadia Podoroska on Wednesday, for a place in the semi-final.

Meanwhile in Strasbourg, Stosur’s reign is over as she was suffered a 6-4, 6-3 loss to former Australian Open finalist Dominika Cibulkova.

The Slovak, who broke twice in both sets, will play Mihaela Buzarnescu in the semi-final after the fourth-seeded Romanian beat Hsieh Su-wei 6-0, 6-3.

The other last-four match will feature Ashleigh Barty and Anastasia Pavlyuchenkova.

Top seed Barty from Australia beat Wang Qiang 7-5, 6-4 while third-seeded Russian Pavlyuchenkova secured a 6-4, 6-2 victory over Zarina Diyas.

Barty, who has one WTA Tour title to her name, is yet to drop a set in Strasbourg this week.