Boston Celtics guard Marcus Smart (right midfoot sprain) is listed as probable for Thursday's Game 2 against the Miami Heat while center Al Horford (health and safety protocols) is doubtful.
Both starters missed the team's 118-107 Game 1 loss in Miami on Tuesday night.
Smart sustained the sprain in Game 7 against the Bucks on Sunday.
Horford's absence came as a total surprise, with no indication of any issue with the veteran forward until the team announced that he had entered the protocols.
Celtics coach Ime Udoka said he initially found out about Horford's status around 5 p.