Top seed Daniela Hantuchova was sent crashing out of the WTA Bell Challenge tournament on Friday, losing 6-4, 6-4 to unseeded Kiwi Marina Erakovic.
The 23-year-old Erakovic, of Auckland, is ranked 85th in the world and is gunning for her first WTA Tour title.
The evening match featured an all-Czech contest as sixth-seeded Barbora Zahlavova Strycova defeated compatriot Andrea Hlavackova 6-3, 7-5.
In other matches, Michaella Krajicek of Netherlands beat crowd favourite No. four seed Rebecca Marino of Canada 6-1, 6-3 and number three seeded Tamira Paszek of Austria downed Britain's Heather Watson 6-4, 7-6 (7/5).