Maria Antonelli/Carolina Salgado, Brazil (9) defeated Kelly Claes/Sara Hughes, United States (16) 2-1 (18-21, 21-16, 15-8).
It was the first FIVB World Tour meeting between the two teams.
Brazil wins Pool I with a 3-0 record and the United States finishes 2nd at 2-1. Also in Pool I, Canada's Jamie Broder/Taylor Pischke and Denyse Mutatsimpundu/Charlotte Nzayisenga of Rwanda are both 0-2.
Both Brazil and United States have advanced to the knockout phase and will play Wednesday, 2 August.