Although the Canadian pair remains perfect in the preliminary round, Toronto's Melissa Humana-Paredes and Winnipeg's Taylor Pischke faced a bigger challenge in their second match Tuesday.
Puerto Rico's Lina Bernier Colon and Eva Tourruella made it a close contest, but fell to the Canadians 21-16 in the opening set and 21-15 in the closing set.
Canada trounced the Cayman Islands 21-8, 21-10 in its opener Monday.
Canada's duo will take on Uruguay Wednesday at 8:00 p.m. ET to conclude preliminary action.
The men's team, which consists of veteran Josh Binstock and Samuel Schachter, is set to play its first match against Nicaragua on Tuesday at 9:00 p.m. ET.