Pierce had no problems in practice Friday before the Celtics headed to Atlanta for Saturday's game.
Coach Doc Rivers says the training staff placed no restrictions on Pierce, who the team says injured his back before returning later in the first half of Wednesday's 96-77 victory over the Hawks.
Pierce said he was stiff on Thursday, but is ready to go. The Celtics hold a 2-0 lead in the best-of-seven series.

Paul Pierce has been cleared to play game three against the Hawks on Saturday.
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