After landing awkwardly in the second quarter of Chicago's game against the Cleveland Cavaliers on Friday night, the Bulls' Derrick Rose was able to return briefly before heading to the locker room during the fourth quarter and not returning to the court.
Rose appeared to roll his left ankle and came up hobbling after a put-back lay-up that cut Cleveland's lead to 48-42 with just over four minutes remaining in the first half.
Rose played during the third quarter, but in nine minutes scored only two points.
The Bulls and the Cavaliers were tied at 98 at the end of regulation. The Cavaliers pulled ahead during overtime, finishing with a 114-108 victory.
Chicago takes to the road to face the Minnesota Timberwolves on Saturday night. Cleveland will begin a three-game road trip by heading to Portland to play the Trail Blazers on Tuesday.