Celtics forward Paul Pierce, left, looks down as he walks up the court with teammate Jeff Green while Boston trailed the Miami Heat during overtime of Game 4 of a second-round NBA playoff basketball series in Boston, Monday night. The Heat beat the Celtics 98-90, and lead the series 3-1.

BOSTON — LeBron James scored 35 points and grabbed 14 rebounds to lead Miami to a 98-90 overtime victory over the Boston Celtics on Monday night and give the Heat a 3-1 lead in the Eastern Conference semifinals.

Dwyane Wade scored 28 with nine rebounds and Chris Bosh had 20 points and 12 rebounds for Miami, which could eliminate the defending conference champions and advance to the East finals with a victory in Game 5 in Miami on Wednesday night.

James, Wade and Bosh scored 83 of Miami’s 98 points and had 35 of its 45 rebounds.

Paul Pierce scored 27, Ray Allen had 17 and Kevin Garnett had seven points and 10 rebounds for Boston.

James made up for a turnover at the end of regulation with a fallaway jumper to start overtime and give Miami the lead for good.

Rajon Rondo, who dislocated his left elbow Saturday night in Game 3, played 39 minutes with a padded sleeve covering what appeared to be a brace on his left arm, scoring 10 with five assists.

Thunder 133, Grizzlies 123 3OT

Kevin Durant scored six of his 35 points in the third overtime, and the Oklahoma City Thunder survived a thriller in holding off the Memphis Grizzlies.

With the victory, the Thunder grabbed back home-court advantage and tied this Western Conference semifinal at two games apiece. Game 5 is on Wednesday night back in Oklahoma City. The winner of the series will play the Dallas Mavericks in the conference finals.

Russell Westbrook led the Thunder with 40 points.