C's Smart probable, Horford doubtful for Thu.

by Gordon Dixon - Marcus Smart (midfoot sprain) is listed as probable for Thursday's Game 2 against the Heat while center Al Horford (health and safety protocols) is listed as doubtful.

C's Smart probable, Horford doubtful for Thu.

Boston Celtics' Marcus Smart (midfoot sprain) probable and Al Horford (health and safety protocols) doubtful for Game 2 against Miami Heat 5:35 PM ET ESPN 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.m. Tuesday. He wouldn't say if Horford tested positive. "As always, we don't comment on the status of our guys," Udoka said. "He's feeling fine. We'll go from there. Wait to see results and tests and future tests." On Tuesday, sources told ESPN's Adrian Wojnarowski that the Celtics are preparing to be without Horford through at least Game 2. ESPN's Tim Bontemps contributed to this report.