Canada's Eugenie Bouchard was eliminated from the Mexico Open on Thursday.
The Montreal native and second seeded in the tournament fell to France's Caroline Garcia 3-6, 6-4, 6-1 in the quarter-finals.
Top-seeded Dominika Cibulkova of Slovakia, defeated New Zealand's Marina Erakovic to move into the semifinals.
On the men's side, top-seeded David Ferrer withdrew from his Mexican Open quarterfinal against South Africa's Kevin Anderson in the second set Thursday with a left leg strain.
Third-ranked Ferrer was leading 6-4, 2-2 when he suffered an inner thigh strain in his left leg. After seeking treatment in the locker room, the Spaniard returned to the court but lost the next two points before retiring.
Ferrer said he will have an MRI on Friday and then assess his recovery.
"I'm very sad because I was playing great", Ferrer said. "I still do not know the extent of the injury.
"I'll have to wait and see before taking a determination. The day was going so well for me and then this happened".
Anderson will next play Ukraine's Alexandr Dolgopolov, who defeated Ivo Karlovic of Croatia, 6-4, 7-6 (4). Anderson, who last week lost the Delray Beach final, will be playing in his first semifinals of an Open 500.
"It's unfortunate to win a match like this, but hopefully he gets better", Anderson said after the match. "I talked to him and he said that it happened when he was trying to go for a ball and felt his leg tweak a little bit."