Taylor Crabb/Jake Gibb, United States (18) defeated Roger Battilana/Gregorio Godoy, Paraguay (42) 2-0 (21-13, 21-14).
It was the first FIVB World Tour meeting between the two teams.
In Pool G, the United States is 2-0, advancing to the knockout phase, and Paraguay is 0-2. Also in Pool G, Poland's Piotr Kantor/Bartosz Losiak is 1-0 and Julian Azaad/Nicolas Capogrosso of Argentina is 0-1.
Up next for the United States is Poland while Paraguay will play Argentina. Both matches are Tuesday, 1 August.