Al Horford (health and safety), Marcus Smart (foot) sit out Boston Celtics' series opener against Miami Heat - ESPN Australia

Al Horford is in the league's health and safety protocols and Marcus Smart has a midfoot sprain, as Boston was minus two starters for Game 1 -- and potentially longer -- against the Heat.

MIAMI -- Boston Celtics starters Marcus Smart (midfoot sprain) and Al Horford (health and safety protocols) missed the team's 118-107 Game 1 loss to the Heat in Miami on Tuesday night. The team made… [+2189 chars]

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