Britain's Johanna Konta won a hard-hitting contest against Slovakian Dominika Cibulkova to reach the Cincinnati Open quarter-finals.
The seventh seed won 6-3 6-4 to reach the last eight for the first time, setting up a rematch of her Wimbledon quarter-final against Simona Halep.
Konta, 26, did well to win a match that was far tougher than the straight-set scoreline suggests and break new ground in Cincinnati.
Five double-faults and a first-serve percentage of just 54% meant the Briton had to work harder than usual in her service games, with Cibulkova teeing off aggressively on the return.
Konta took the first set with two breaks of serve to one and looked to have the match well under control when she broke at the start of the second set.
However, Cibulkova refused to submit and had three break points for a 4-2 lead as a gripping set unfolded.
Konta clung on and grabbed her chance with a deep return on break point at 4-4 before serving out for a fine win, finishing with 24 winners to Cibulkova's 10.