British number one Johanna Konta continued her impressive form as she beat Maria Sakkari to reach the Western and Southern Open semi-finals.
The 29-year-old has still not dropped serve all week after a 6-4 6-3 victory over the Greek player, who beat Serena Williams in the last round.
Konta dominated throughout a one-sided match, converting three of 12 break points in a routine over the 13th seed.
The eighth seed meets Victoria Azarenka in Thursday's semi-final (17:30 BST).
"I was really pleased I was able to adapt well and stay tough when I needed to," said Konta, whose partnership with new coach Thomas Hogstedt has started well in New York.