BOSTON (AP) _ Antoine Walker hit a 3-pointer with seven-tenths of a second left to give the Boston Celtics an 82-81 victory over the Miami Heat on Friday night.

Walker scored 12 of his 29 points in the fourth quarter as the Celtics rallied with a 18-6 run in the final five minutes.

Tim Hardaway led the Heat with 19 points while P.J. Brown scored 16 with 14 rebounds as the Heat fell to 0-2 against Boston this season.

Hardaway's layup and two free throws by Brown gave the Heat an 81-77 lead with 40 seconds left. Walker hit a jump shot with 28 seconds showing, and the Celtics then forced Miami into a 24-second violation to set up the winning 3-pointer.

Boston began its winning run when Paul Pierce tipped the ball in with 4:36 left, then made the first of two free throws, rebounded his own miss and hit a jump shot to cut the Miami lead to 75-69 with 4:18 left.

Walker's 3-pointer sliced the Miami margin to 75-72 with 3:43 left, and he followed with a jump shot 43 seconds later.

Hardaway led the Heat with 14 points in the first half while Brown and Mashburn scored 10 each as Miami led 46-33 at intermission.

Notes: The Celtics can finish with a winning record for the first time under Rick Pitino if win all their remaining games. ...Ron Mercer left the game in the third quarter with back spasms ...The Heat are yielding a league-low 83.5 points per game. ...Hardaway is shooting 12-of-28 from 3-point range in his last four games.