Blake and Querrey are expected to unite as a doubles team. Venus and Serena Williams will play doubles, as will Davenport and Huber.
Both Williams sisters have won Olympic gold medals -- Venus in both singles and doubles and Serena in doubles. Davenport also has an Olympic singles gold.
The men will be coached by Rodney Harmon, the women by Zina Garrison.
The Olympic tennis competition will begin Aug. 10.
Gold medal matches in women's singles and men's doubles will be played Aug. 16. Finals in men's singles and women's doubles will be held Aug. 17.