11:25 AM ET
- ESPN.com news services
The Bulls said Rondo's injury will not require surgery.
The Bulls have a 2-0 lead in the best-of-7 series, which resumes Friday night in Chicago.
Rondo is averaging 11.5 points and 10 assists in the Bulls' two victories over the Celtics, and he was just one rebound shy in Game 2 of becoming the team's first player since Scottie Pippen (1997) to get a postseason triple-double.
He finished Game 2 with 11 points, 14 assists, nine rebounds and five steals. The 14 assists tied a Bulls playoff record.