Celtics finish off Heat without Kristaps Porziņģis as Boston's 'sixth starter' answers the call
Al Horford stepped up for Boston in Game 5, and now the real test begins for the Celtics, who will likely be without their starting center for the conference semifinals.
Al Horford stepped up for Boston in Game 5, and now the real test begins for the Celtics, who will likely be without their starting center for the conference semifinals.
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