Whenever there’s a discrepancy between the shot clock and game clock, NBA teams that trail by three points or less normally will play defense and try to get a stop. That was the situation the Celtics  were in on Monday night, down 76-75 with 28 seconds left in Game 2 after a Ray Allen  pull-up jumper misfired.
But the Sixers had a foul to give, so coach Doc Rivers  instructed Rajon Rondo  to intentionally foul Evan Turner  with 14.4 seconds left in the game and 10 seconds left on the shot clock (the Celtics also had a foul to give). After Paul Pierce  then fouled Turner again, the Sixers guard made both free throws with 12 seconds left.
“Obviously, if they didn’t have a foul to give we would’ve played the clock out,” Rivers said. “My thinking was, it would be a four-second differential. There’s no guarantee you’re going to get the rebound. By the time you rebound it’s probably three seconds, and then they have the foul to give, so they foul and now it’s down to two seconds.”
The error the Celtics made was in not fouling earlier. They let 10 seconds burn off the clock before Rivers called for the foul.
“That’s the mistake we made,” Rivers said on the Dennis & Callahan show .
It was one of several mistakes in execution the veteran Celtics made down the stretch. Most egregious was a possession with about a minute to go and the Celtics holding a one-point lead. They were trying to get Ray Allen coming off a screen, but Avery Bradley  didn’t clear the corner and the play broke down, forcing Rondo to fire up a contested jump shot from the top of the key.
“It was a play we call elbow-X. We didn’t get into it,” Rivers said. “Rondo was frustrated because we didn’t get into it the correct way. Ray really was not open because the guy in the corner didn’t clear out of the way like he’s supposed to do. It was a wasted possession at a time when you can’t have one.”