Ana Ivanovic will face China's Shuai Zhang in the semi-finals of the Birmingham Classic tennis tournament, after the top-seeded Serb beat the sixth-seeded Czech Klara Koukalova 6-1 6-4.
Zhang upset third-seeded American Sloane Stephens 6-3 6-1 to book her semi spot.
The Australian tennis player Casey Dellacqua thumped 43-year-old Japanese veteran Kimiko Date-Krumm 6-1 6-0 in just 48 minutes to reach the other semi-final, where she'll face another Czech, Barbora Zahlavova Strycova, who upset fourth seeded Belgian Kirsten Flipkens 6-4 6-2.
