Former college star Mallory Burdette played on Day 1 of an action-packed week at the Bell Challenge.
As did Canada's own Aleksandra Wozniak, a former World No.21, who squared off with Caroline Garcia.
The No.8-seeded Garcia crushed home hopes, though, making it past Wozniak in straight sets, 63 64.
And former champion Tamira Paszek was also ousted on Day 1, falling to Christina McHale, 62 61.
McHale had reached the only WTA semifinal of her career right here three years back in 2010.
Day 2 began with a shocker - top seed and defending champion Kirsten Flipkens fell to Polona Hercog.
No.4-seeded Bethanie Mattek-Sands made it through, though, defeating Stéphanie Dubois, 63 64.
Mattek-Sands, a former finalist in Québec City, stopped to sign some autographs after the victory.
And at night, No.2 seed Kristina Mladenovic won a grinder against Melanie Oudin, 76(5) 57 62.
Anna Tatishvili wasn't so fortunate, falling in straights to the No.3 seed, Lucie Safarova, 63 62.
Mirjana Lucic-Baroni, a former Wimbledon semifinalist, won her opening match with Sharon Fichman.
One the most dramatic matches of the week was Andrea Hlavackova against Anastasia Rodionova.
The first round match took place on Wednesday and the two players split two grueling sets to start...
But Hlavackova totally pulled away in the third set, eventually beating Rodionova, 76(3) 57 61.
A No.5-seeded Eugenie Bouchard also began her campaign on Wednesday, edging Sofia Arvidsson.
Petra Martic won her opener on Wednesday too, beating Hlavackova's doubles partner, Lucie Hradecka.
Sesil Karatantcheva was Bouchard's second round opponent but fell to the Canadian, 76(2) 64.
No.7 seed Lauren Davis' run came to an end against No.3 seed Safarova in the quarterfinals, 62 64.
Hercog's run also came to an end on Quarterfinal Friday, barely falling to McHale, 16 76(4) 63.
Mladenovic was outgunned by an in-form Bouchard in the last match on Quarterfinal Friday, 63 62.