With the will of the Flash, the Miami Heat refused to let the Boston Celtics end their season on their home court Sunday afternoon.

Playing what might have been his final game in Miami, Dwyane Wade scored 46 points, 30 in the second half — both franchise records as the Heat beat the Celtics 101-92 in Game 4 of their first-round series.

He made 16-of-24 shots including 5 of 7 from 3-point range, and outscored the Celtics 19-15 in the fourth quarter.

The Celtics still lead the best-of-seven 3-1, and get a chance to close it out in Boston on Tuesday night. But their worst fear came true Sunday.

Quentin Richardson scored 20 points and Michael Beasley added 15 for the Heat, who wasted an 18-point, first-half lead before digging deep to extend the season.

Rajon Rondo led the Celtics with 23 points. Kevin Garnett had 18 points and 12 rebounds, Paul Pierce scored 16 and Ray Allen added 15 for Boston, which was bidding for its first 4-0 sweep of a series since 1986.

Leg cramps kept him off the court for the deciding moment of Game 3, the jumper that Pierce hit at the buzzer to give the Celtics a 100-98 win. So he spent Saturday getting his body right, chugging fluids, jumping into the cold tank, hanging out in the pool with his mother Jolinda, visiting from Chicago.

In other NBA playoff action:

• With Tim Duncan and Manu Ginobli struggling all night, George Hill scored 29 points to help the Spurs push the Mavericks to the brink of elimination with a 92-89 victory on Sunday night; taking a 3-1 series lead. The Mavs squandered a 14 point lead in the 3rd quarter when the Spurs outscored them 29-11.
• LeBron James delivered his fifth career postseason triple-double with 37 points, 12 rebounds and 11 assists to lead the Cleveland Cavaliers to a 121-98 victory over the Chicago Bulls on Sunday and a 3-1 lead in their first-round series.
• Carlos Boozer had 31 points and 13 rebounds for the Utah Jazz; who held off a late rally by the Denver Nuggets for a 117-106 victory to take a 3-1 series lead.
• Kevin Durant scored 22 points and Russell Westbrook added 18 points and eight rebounds, and the Thunder tied up their series against the Los Angeles Lakers with a 110-89 victory in Game 4 on Saturday night.
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