World number one Ashleigh Barty eased through to the semi-finals of the Cincinnati Open with victory over Barbora Krejcikova.
Australian Barty beat the Czech ninth seed 6-2 6-4, but had to recover from a break down in the second set.
Barty also beat French Open champion Krejcikova on her way to her maiden Wimbledon title in July.
The 25-year-old, two-time Grand Slam champion will face Angelique Kerber or Petra Kvitova in the last four.
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