According to USA Basketball protocol due to the pandemic, Zach LaVin did not fly with his family to the Tokyo Olympics on Monday.
The Americans hope that this week they will be able to count on the Bulls star.
Eight players and coaches arrived on Monday.
Jrew Holiday and Chris Middleton of the Bucks take part in the NBA Finals alongside Devin Booker of the Suns.
The United States has won the last three Olympics. They will start the Tokyo Games against France on July 25th.
The Americans are led by Gregg Popovich, who has led the Spurs to five NBA championships.