Seconds after Chauncey Billups  limped to the bench with an apparent knee injury, Toney Douglas  assumed the Mr. Big Shot mantle — draining a long 3-pointer from the wing with 38 seconds left to snap an 82-82 game. But an alley-oop to Kevin Garnett , a questionable offensive foul call on Carmelo Anthony and a Ray Allen  3-pointer with 11 seconds remaining helped the Celtics  survive, 87-85, in Game 1 of their first-round NBA Playoff series.
Allen scored a team-high 24 points, and all five Celtics starters reached double figures, including Jermaine O’Neal  (12 points). Knicks forward Amar’e Stoudemire led all scorers with 28 points.
WHAT WENT RIGHT
Ray Allen asserts himself: After not attempting a field goal in the opening quarter, Allen took advantage of a matchup against Anthony Carter  to score six quick second-quarter points. He added seven in the third quarter and finished with 24 for the night, capped by the game-winning 3-pointer with 11 seconds remaining. He hadn’t scored 20 points since March 19.
Second-half defense: After giving up 51 points to the Knicks on 19-of-35 shooting (54.3 percent), the Celtics held New York to 5-of-28 shooting (17.9 percent) in the first 15 minutes of the second half. In that stretch, the Celtics turned a 51-39 halftime deficit into a 66-64 lead with nine minutes to play.
Jermaine O’Neal contributes: He may have only recorded one first-half rebound, but O’Neal made his presence felt in the third quarter. The Celtics’ starting center totaled six points, two rebounds and a pair of blocks that helped slice the Knicks’ 12-point halftime lead in half. His play on both sides of the ball seemed to raise the effort of his teammates as well — as the C’s held the Knicks to 13 third-quarter points. Along with his 12 points, O’Neal finished with four rebounds and four blocks.
The Rondo conundrum: Taking advantage of the fact that Chauncey Billups was playing almost 10 feet off him, Rajon Rondo  took 10 first-half shots and made five of them, heading into the locker room at the break with a team-high 10 points. On the down side, in the first half he had just two assists, didn’t attempt a free throw and passed up a couple more open lanes in favor of more difficult jump shots from his teammates.
In the second half, though, Rondo returned to his primary role as distributor. While he didn’t score again, the Celtics point guard approached a triple-double with 10 points, nine assists and nine rebounds.
WHAT WENT WRONG
Not taking advantage of Melo’s absence: After just 88 seconds of playoff basketball, Anthony sat on the bench with a pair of quick fouls. He didn’t return in the first quarter. It was a golden opportunity for the Celtics to snare an early lead and take control of the game. Instead, they allowed old friend Bill Walker  to score a team-high seven first-quarter points and stay within one at 24-23 after 12 minutes.
The second-quarter collapse: While the Celtics shot just 6-of-18 and scored 15 points in the second quarter — including only two assists — the Knicks torched the C’s defense to the tune of 28 points. After Walker had his turn against Pierce in the first quarter, Anthony took over and scored 12 second-quarter points on the captain. Meanwhile, Stoudemire put an exclamation on the Knicks’ surge into halftime by driving past Glen Davis  and throwing down a monster dunk that stretched his team’s lead into double digits. Of course, prior to the game, Davis had claimed “it’s really not that hard ” to guard Stoudemire.
Where’s the bench? On paper, the Celtics have the deeper team, but led by Walker the Knicks outscored the Boston bench 23-8. Glen Davis had a lot to do with the C’s struggles in that department, shooting only 1-of-8 from the field for two points. In fact, because O’Neal performed so well, he actually took the closing center reins from Davis, who had held that position for the Celtics all season. While Davis returned in the final minute, O’Neal got the bulk of the fourth-quarter minutes at center.