BOSTON (AP) -- Paul Pierce hit a go-ahead jumper with 31 seconds left and the Boston Celtics beat the Miami Heat 100-98 in double overtime Sunday after learning that All-Star point guard Rajon Rondo was out for the season with a knee injury.

Rondo will have surgery for a torn anterior cruciate ligament in his right knee. He was hurt late in Boston's 123-112 loss, also in two overtimes, to the Atlanta Hawks on Friday night.

This game was the first in Boston for Ray Allen since he left the Celtics after five seasons and signed as a free agent with Miami. He scored 21 points.

Kevin Garnett led the Celtics with 24 points and 11 rebounds, and Pierce had 17 points, 13 rebounds and 10 assists. LeBron James had 34 points for the Heat.