The USA men's basketball team flew to Tokyo on Monday without Zach LaVine, but the Chicago Bulls guard has not been ruled out for the Olympics.
USA Basketball announced LaVine had been placed under health and safety protocols and would not travel with the team, but said it hoped he would be able to join them later this week.
Winners of the last three Olympic gold medals, the USA made two roster changes late last week, adding JaVale McGee and Keldon Johnson to replace Kevin Love and Bradley Beal.
Love withdrew because he has not fully recovered from a calf injury, while Beal had to drop out due to health and safety protocols.
Head coach Gregg Popovich will hold out hope that LaVine is indeed able to rejoin the team before the July 25 Group A opener against France in Saitama.
The 26-year-old is coming off his best season, establishing career highs with 27.4 points, 5.0 rebounds and 4.9 assists per game and making the All-Star team for the first time.
He figures to play a key role for Team USA, if only because fellow backcourt mates Devin Booker and Jrue Holiday are still playing in the NBA Finals and may not be at full strength from the beginning of the Olympic tournament.
LaVine started Sunday's exhibition win against Spain in Las Vegas and scored 13 points.