Marcus Smart is questionable for Game 1 of the Eastern Conference Finals with a mid-foot sprain.

Head coach Ime Udoka revealed the Boston Celtics star suffered the injury in their blowout win over the Milwaukee Bucks in Game 7 of their semi-finals series.

Smart is, therefore, a doubt to face the Miami Heat in the series opener in south Florida as the Celtics aim to steal the initiative against the East's one seed.

The 2021-22 Defensive Player of the Year, Smart has arguably not had the impact he would have desired so far in the postseason.

However, he played an instrumental role in forcing Game 7 against the Bucks, scoring 21 points and recording seven assists and five rebounds to help the Celtics set up a decider.

Smart had 10 assists and seven rebounds in Game 7, finishing with a plus-minus of plus-18 that was second only to Grant Williams (+25) as the Celtics routed the Bucks 109-81.

Perhaps his biggest influence in this postseason has been on the glass.

During the playoffs, opponents are averaging 43.6 rebounds per 100 possessions when Smart is on the court and 46.7 when he is off the court.

Similarly, opponents have averaged 13.5 second-chance points per 100 possessions with Smart out there compared to 15.3 against Celtics line-ups not including him in the playoffs.

The Celtics also do a better job of stealing the ball with Smart on court (7.3 per game) compared to when he is on the bench (6.2).

Boston will hope to have him out there to prevent Jimmy Butler and Miami from getting hot, and the Celtics will have center Rob Williams, who has not featured in any of the last four games due to a bone bruise, available with no minutes restriction.