Britain's Naomi Broady has been knocked out of the Monterrey Open in the second round after losing in three sets to number four seed Timea Babos.
World number 136 Broady, 28, who beat Canada's Carol Zhao in round one, lost 6-3 6-7 (6) 7-5 to the Hungarian with a place in the quarter-finals at stake.
Babos will now face Puerto Rican number five seed Monica Puig who beat Swiss Stefanie Voegele in straight sets.
Top seed Garbine Muguruza also won in Mexico.
The Spanish world number three beat Russia's Evgeniya Rodina 6-2 6-3 and will play Australian Ajla Tomljanovic in one of the other quarter-finals.