Game 4 Injury Report: Who's In, Who's Out For Celtics and Heat?

Update (4:33 p.m.)

Marcus Smart has been ruled out for Game 4, while Robert Williams and Jayson Tatum are available.

For the Heat, Tyler Herro is out but Jimmy Butler, Kyle Lowry, Gabe Vincent, Max Strus and P.J. Tucker are all expected to play.

The No. 1 seed Heat jumped out to a 2-1 series lead with their Game 3 victory. Both teams enter Game 4 with many key injury questions:

Boston Celtics Injury Report

Marcus Smart is the main injury concern for the Celtics. The Defensive Player of the Year suffered a grade 3 right lateral inversion ankle sprain in the third quarter of Game 3, but made a triumphant return to hit a 3 and finish the game.

Overnight swelling is the main concern for Smart and he carries a SIC score of 64, meaning he will have limited mobility on both ends of the floor, if he's active for the game, according to our team of Pro Basketball Docs.

Robert Williams III is also listed as questionable and missed Game 3 with left knee soreness. The extra time off should help his bone bruise and he has a chance to play in Game 4, but will likely have limited mobility on the defensive end.

Jayson Tatum suffered a stinger late in Game 3 and is listed as probable for Game 4 with a right cervical nerve impingement. He will play and likely be unaffected by the injury.

Miami Heat Injury Report

Jimmy Butler did not play in the second half of Game 3 because of right knee inflammation. He missed Game 5 against the Hawks with the same issue, but reportedly intends to play in Game 4.

Kyle Lowry is also listed as questionable with a left hamstring strain he's been battling since late April. Lowry will likely play, but had to leave to the locker room at multiple points in Game 3 to keep his hamstring warm and stretched out. 

Still, he performed better than expected, finishing with 11 points, 6 assists and 4 steals in 29 minutes.

Tyler Herro has been ruled out for Game 4 with a left groin strain he picked up in Game 3. Victor Oladipo will see increased time with Herro out.

The other Miami questionables: Gabe Vincent, Max Strus and P.J. Tucker have all played through their respective injuries this series and there's no reason to believe they won't continue to do so.

Check out the latest odds and SIC team health scores below: