Britain's Naomi Broady was beaten 6-3 6-2 by fifth seed Timea Babos in the second round of the Monterrey Open.
The 27-year-old British number two failed to trouble Babos as the Hungarian claimed victory in just over an hour in Mexico.
Babos, 23, will face second seed Anastasia Pavlyuchenkova in the quarter-finals.
Defending champion Heather Watson takes on Russia's Ekaterina Makarova in her second round tie at 22:15 BST.