Top seed felled in Bogota
Top seed Marina Erakovic was defeated in the second round in Bogota.
New Zealand's representative in the competition was beaten 6-4 6-4 by Edina Gallovits-Hall.
Fifth seed Gisela Dulko of Argentina was also on the end of a shock result as she fell 7-5 6-2 to Russia's Alexandra Panova.
Wednesday's late match saw Paula Ormaechea beat Petra Rampre 6-4 3-6 7-6.