Chicago Bulls point guard Derrick Rose was held out of Saturday's preseason game against the Washington Wizards in Rio de Janeiro because of soreness in his surgically-repaired left knee.
The Bulls said the move was only precautionary.
Executive vice president John Paxson said Friday that Rose developed soreness during practice.
"We never anticipated a straight line," Paxson said. "He had a little soreness and we are being ultraconservative because it's the third game of preseason.
"We respect tremendously the fact that we're in Brazil and what that means, and we'd love for everybody to play. But the reality is it's too early to even press anything."
Rio de Janeiro is the site of the 2016 Olympics.
Rose missed all of last season after he tore the ACL in his left knee during the 2012 playoffs.
Rose played the Bulls' first two preseason games.
Paxson said Saturday that the soreness was not unexpected and there are no plans for an MRI.
"We know there's nothing structurally to be worried about," he said. "It's just a little soreness. If it was any other player, we'd do the same thing."
Chicago's next preseason game is Wednesday against the visiting Detroit Pistons.