Practice: Smart watches, rehabs

Chris Forsberg

Marcus Smart observes Celtics practice with his leg wrapped on Tuesday.WALTHAM, Mass. -- Boston Celtics rookie guard Marcus Smart observed the team's practice Tuesday while wearing an air compression boot over his injured left ankle.

Smart suffered a high ankle sprain and bone bruise after stepping awkwardly on the foot of Indiana's Lavoy Allen on Friday night. While the injury looked more severe on the court, the Celtics announced Smart's recovery at just two to three weeks.

On Tuesday, Smart watched the end of the team's practice session with the left leg elevated on a padded bench at one end of the floor. He walked gingerly to the locker room once the air compression boot was removed.

"I told him when he first went down -- I didn’t know how severe the injury was -- but I just told him, 'Stay positive, and stay around the guys and keep your spirits up,'" Celtics guard Rajon Rondo said. "He has a long career ahead of him. He's missed a couple of games, and he might miss a lot more, but you never know. It's just being very fortunate to play this game day in and day out."

Smart has immersed himself in rehab with coach Brad Stevens noting that he came to the practice facility for treatment three times on Sunday. If Smart is able to return three weeks from his diagnosis this past Saturday, then he'd miss only eight games as Boston's schedule is fairly light the rest of the month.

A few other tidibts from Tuesday's practice:

Rondo returns: Rondo was back on the floor for the first time after minor surgery to remove screws from his left hand on Saturday. Hop HERE for more.

Thornton departs: Backup shooting guard Marcus Thornton twisted his ankle during practice and did not return. Stevens said he walked off under his own power and that an initial check suggested it wasn't a severe injury. "First look looks mild and it’ll be a day-to-day type thing," Stevens said. "But we don’t know that for sure. We’ll see how he feels [Wednesday] morning."

Young set to rejoin C's: Rookie James Young, away from the team the past couple of days while dealing with an illness in his family, was set to rejoin the team on Tuesday night.