Boston Celtics players Marcus Smart and Robert Williams III will be listed as questionable for Sunday night's Game 7 of the Eastern Conference finals against the Miami Heat.

The NBA All-Defensive team selections were revealed last night, and two Europeans made the cut for the First Team.

Boston Celtics point guard Marcus Smart has been listed as probable for Thursday night's Game 2 of the Eastern Conference finals against the Miami Heat, but forward Al Horford is doubtful.

Smart suffered a right mid-foot sprain during Sunday's Game 7 triumph over the Milwaukee Bucks. Horford entered COVID-19 health and safety protocol Tuesday.

Smart is averaging 15.0 points and 6.2 assists per game in 10 playoff games (all starts), slightly up from his regular-season averages of 12.1 points and 5.9 assists. He was named NBA Defensive Player of the Year.

Horford is averaging 13.0 points, 9.4 rebounds and 1.4 blocks across 11 playoff games (all starts).

The 35-year-old played a crucial role in Game 4 of the Celtics' second-round series with the Milwaukee Bucks, when he scored a playoff career-best 30 points on 11-for-14 shooting to help Boston even that series at two games apiece.

The Celtics lost 118-107 to Miami in Game 1 on Tuesday night.

Point guard Marcus Smart remains questionable hours before Game 1 of the Eastern Conference finals and the Boston Celtics expect the decision on his availability just before tipoff in Miami on Tuesday night.

The Heat are relatively healthy but are again without point guard Kyle Lowry because of a hamstring injury.

Smart, the NBA Defensive Player of the Year, continues to experience soreness in his right foot.

"The swelling is there, the soreness is there," Celtics coach Ime Udoka said after Tuesday's shootaround. "We'll monitor him, how he reacts to treatment today. Long day, he has an extra hour (before tipoff) or two. He tested it out a little bit here. We'll see how it goes. It's very sore. Legitimately questionable."

An MRI exam on Monday detected a right midfoot sprain. Smart was injured Sunday in the Celtics' Game 7 win over the Milwaukee Bucks.

"He took a pretty bad fall, got bent up," Udoka said. "It's pretty tender and sore right now. We'll get him round-the-clock treatment."

Smart is averaging 15.0 points and 6.2 assists per game in 10 postseason games, besting his average of 12.1 points and 5.9 assists during the regular season.

He might be most important in helping the Celtics contain Heat All-Star Jimmy Butler. Butler enters the series as the player with the most playoff experience on the Miami roster (90 games).

Butler said he expected to be a focal point of Boston's defense, but spared any care for the topic of how he'll be defended.

"I really don't care, honestly," he said.

Butler averaged 22 points, 3.5 rebounds, and 2.0 assists in two regular-season games against Boston this season.

Celtics point guard Marcus Smart suffered a midfoot sprain in Boston's Game 7 victory Sunday and is questionable for Tuesday night's Eastern Conference finals opener at Miami.

Smart had an MRI on his right foot and it came back clean, ESPN reported Monday.

Celtics coach Ime Udoka told reporters that the Celtics will see how Smart's foot feels Tuesday ahead of tipoff.

However, Udoka added that Robert Williams won't have any restrictions and will play against the Heat. Williams was available to play in Sunday's finale against the Milwaukee Bucks but Udoka said he didn't want to shift his rotation.

Smart finished with 11 points, 10 assists, and seven rebounds in the Game 7 win.

Smart is averaging 15.0 points and 6.2 assists per game in 10 postseason games, besting his average of 12.1 points and 5.9 assists during the regular season.