For the last three days all the Celtics  have been saying is that they have to play better. Their lead on the Knicks in their first round playoff series was great, but they knew they got away with uneven performances in both games. New York had something to do with that too, especially some of their role players who played above their heads, to say nothing of the tremendous individual performances by Carmelo Anthony and Amar’e Stoudemire.
But the Celtics believed that the close games had more to do with their inconsistencies. “I just want us to play well,” Doc Rivers  said prior to tip-off. “[If] we play well, we will see what happens.”
They played well in Game 3. They played perhaps their best playoff game since Game 5 in Cleveland last year when they silenced LeBron James  and the Cavaliers  and kickstarted their run to the NBA finals . The feeling inside Madison Square Garden was eerily reminiscent. A hopped up crowd was stunned to silence early and when the Knicks tried to make a run early in the second half, the Celtics went into kill mode.
The result was a 113-96 blowout that gave them a commanding 3-0 lead. This is what the Celtics look like when they play well.
WHAT WENT RIGHT
What’s better than a great start? What the Celtics did: The pregame chatter was all about the Knicks riding the energy of the first home playoff game in seven years to a quick start. Instead it was the Celtics who established the early pace. They led 22-5, their biggest lead of the series and got center Ronny Turiaf in early foul trouble. Coming into another team’s arena and taking the crowd out of the game has always been a point of pride for the Celtics. “If you want to bother us, tell no one to come,” Doc Rivers said an hour before tipoff. “That will freak us out.”
Paul Pierce  was locked in: In another quiet Celtics locker room before the game, Paul Pierce saw a couple of players engaged in small talk with a couple of reporters. “None of that,” Pierce said quietly but forcefully. He wasn’t kidding. Pierce was in his own world, all business, and he played like it, scoring 14 points in the first quarter. He took over at various times and seemed to make every big shot whenever the Knicks threatened to make a run. Ray Allen  was phenomenal. Rajon Rondo  had a triple double and 20 assists , but this was Pierce’s game.
The Celtics owned the 3-point line: Late in the season, the Celtics game from behind the arc went missing. It looks like they found it. Allen knocked down 8 of 11 and now has made an incredible 15-for-20 in the series. Pierce added six more and the Celtics made 14 3’s, which was a season high. They obviously won’t shoot this well again, but their success from behind the arc is a good sign for a team that has been fighting to recapture its offensive identity.
WHAT WENT WRONG
The bench was better, but still ineffective as a group: First, the bad news. The Celtics big first quarter lead evaporated as soon as Rivers went to his bench. Like clockwork it seems these days. But there was a glimmer when the second unit was able to keep the lead at five points. Not great, but it was something. There was some honest to goodness good stuff too. Jeff Green  finally provided some offensive punch scoring seven first half points. But the backups have to start playing better soon.
Too many turnovers: This is nitpicking considering how well the Celtics played, but they once again turned the ball over too much. Considering the score and the way they cleaned up their work on the defensive glass, it’s perhaps asking too much for them to play a perfect game, but the turnover problem has been an issue.