Kelly Claes / Sara Hughes, United States (16) defeated Denyse Mutatsimpundu / Charlotte Nzayisenga, Rwanda (40) 2-0 (21-10, 21-11).
It was the first FIVB World Tour meeting between the two teams.
In Pool I, the United States is 2-0, advancing to the knockout stage and Rwanda is 0-2. Also in Pool I, Maria Antonelli / Carolina Salgado, Brazil is 2-0 and Canada's Jamie Broder / Taylor Pischke is 0-2.
Up next for the United States is Brazil while Rwanda plays Canada. Both matches are Monday, 31 July.