Rajon Rondo  may be a guard but he certainly is getting accustomed to being in the center of the action.
“D-West talked to me coming out of halftime and couple of guys told me to try and up the tempo and the only way I could do that was by pressuring the ball,” Rondo said.
Even if it meant picking up LeBron James  at midcourt. And he did. And the Celtics responded with a 20-3 run that gave them the lead they never relinquished.
“I was just trying to cut the head of the horse, just wanted to change the tempo of the game,” Rondo added.
Rondo had a triple-double with 11 points, 10 rebounds and 10 assists and Kevin Garnett  added 19 points as the Celtics won for the third time in as many tries against King LeBron and the Heat, 85-82, Sunday afternoon at TD Garden.
So Doc, whose brilliant idea was it?
“It was Rondo’s idea,” Rivers said. “Really what it was, was that we just ‘ I told him to pressure the ball, and he took that whoever brought it up. I didn’t mean that. He took it that way and then I stayed with it. He actually during a time-out thought we were going to switch back, and when I didn’t say anything he was surprised. Because I liked it.
“Sometimes you go off the book and today was clearly that. That match-up made no sense, honestly. And it hurt us a couple times. The only thing I saw honestly is that it gave us life. Because he was trying so hard and working so hard, I just sort of force everybody else to join in. And even [Assistant Coach] Lawrence [Frank ] was like ‘We can’t do this!’ And I said, ‘You’re right, but we’re just going to keep doing it.’ And it was good for us.’
The Celtics, who scored just 11 points in the fourth quarter, reclaimed first in the Eastern Conference by a half-game over the Heat, improving to 39-14 while the Heat fell to 39-15. With a chance to tie the game, James missed the front end of a pair of free throws with 12.5 seconds remaining and Mike Miller  missed a potential game-tying 3-pointer just before the buzzer.
The Celtics had six players in double figures but captain Paul Pierce  was not one of them. He missed all 10 shots and finished with just one point in 39 minutes. The Celtics shot just 30 percent in the opening quarter and 37 percent in the first half, and trailed 43-39 at the half. But Boston outscored Miami, 20-3, to open the third quarter and take command of the game.
The third quarter also featured some playoff-brand physical play and frustration from the the Heat. After Zydrunas Ilguaskas set a devastating screen on Rondo, who immediately got up. Moments later, Garnett got retribution with a clean pick on Mike Miller . But Dwyane Wade  took exception and threw an elbow at Garnett. Wade was whistled for a flagrant foul and the two teams had to be separated.
The Celtics are off until Wednesday when they host the Nets  in the final game before the All-Star break.