Johanna Konta missed a chance to become the first British woman to break into the world's top 10 for 32 years with a Rogers Cup quarter-final defeat.
Konta, 25, lost 6-4 6-3 to Slovakian qualifier and world number 121 Kristina Kucova on Friday in Montreal, Canada.
A win for Konta, ranked 147th last June, would have made her the first British woman since Jo Durie in September 1984 to make the WTA top 10.
Kucova, 26, will play American 10th seed Madison Keys in the semi-final.
Romanian Simona Halep and Australian Open champion Angelique Kerber of Germany will meet in the other semi-final.