The spectacular quarterfinal on the grass in Berlin went to the world's number one player - Arina Sabaljenka, who won against Kazakhstan's Yelena Rybaklina 2:1 (7:6, 3:6, 7:6).
The Belarusian faced four tied match points from her rival in the tie-break of the third set, but she tied six points and set up a duel with the Czech Republic's Marketa Vondruosova.
The Sabalian player had a chance to end the match early, with the only break in the third set she took a 5:4 lead, but a rebreak followed from the 11th-ranked player in the world, who had as many as 14 aces.
Vondruosova had earlier easily defeated Tunisian Ons Jaber 6:4, 6:1.
Bonus video:
