As soon as Ray Allen agreed to sign with the Miami Heat, the most fervent Celtics supporters began their over-rationalizing. The Celtics were better off without him, they said, and he was not even capable of contributing much to the team anymore, anyway. The loss of Allen was made out to be some sort of addition by subtraction. That was not true at the time, of course. Jason Terry was on board when Allen reportedly agreed to his two-year deal with the Heat in July, but Terry is a notch below Allen as a player both right now and over the course of their illustrious careers. The eventual additions of Courtney Lee and Leandro Barbosa may have made the Celtics deeper and more versatile at the off-guard position, but that is the benefit of hindsight. Losing Allen immediately made the Celtics worse while making an Eastern Conference rival better. Allen reminded the Celtics that he is not quite done with a vintage performance in helping his new team, the Heat, beat his old team, the Celtics, in a defense-optional track meet on Tuesday. Playing more than 30 minutes, Allen scored 19 points on 5-for-7 shooting to bury Boston 120-107. The most egregious mistake was made by the player who nominally replaced Allen, and it came within a minute of both players checking in for their new teams for the first time. As Miami point guard Norris Cole dribbled along the baseline, he was momentarily trapped by Celtics defenders. But Terry, guarding Allen, inexplicably took his eye off the most accomplished 3-point shooter in NBA history, who slid behind Terry and into the corner, directly into Cole's line of sight. Cole passed to Allen and Allen fired a shot, slightly fading to the left, as Celtics fans watched him do hundreds of times over the last five years. Of course, it went in. "He was terrific," Celtics coach Doc Rivers said of Allen. "He made shots, he went right all game and we allowed him. But he made a lot of shots. You can live with LeBron [James] and [Dwyane] Wade making jump shots, but the first play Ray was on the floor, we leave him by himself in a corner. You would think we would know better."

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