I was just trying to stay as neutral as I could, Garnett said at the time. I just saw the Heat uniforms and obviously hes on the other side.
Asked if he would greet his former teammates again, Allen said: I will do what Ive always done.
Rivers hardly diffused any simmering friction, saying in October: He made a choice. Do I think it was the wrong choice? I absolutely do.
But Allen has no regrets. He said he has enjoyed playing in South Florida, aside from the vexing traffic, but added he will wait until after the playoffs to decide whether to exercise his opt-out clause.
There have been adjustments, though, including coming off the bench for the first time in his career.
Your body is tighter, he said. I run off the bench to trick my body into thinking I havent been sitting there.
He said hes still finding a rhythm, trying to find out where the shots are coming from and being ready where they do come.
His minutes have dropped from 34 to a career-low 25.5 per game, which was expected. At his introductory news conference, Heat president Pat Riley said he hoped Allen would match last seasons numbers of 14.2 points per game, 45.8 percent shooting and 45.3 percent on three-point attempts.
His scoring is down to a career-low 11.4 (a byproduct of fewer minutes), but his shooting percentages 47.6 overall and 44.3 on threes stand above his career averages.
He is more comfortable and thats the most important thing, Spoelstra said. He is savvy. He knows how to fit in.
Allen said he has watched Boston games occasionally on television but, I dont seek it out.
Asked if hes missed by the Celtics, who have lost six in a row to drop to 20-23, he said: I couldnt tell you. I guess well see when we get there.
Allen was painstakingly diplomatic last week, putting aside any unpleasant feelings from his final months in Boston.
Ive moved on, but who I was as a Celtic will always be inside of me, he said. I look back and think about all the great times that we had. I will always cherish those moments there.
• Allen isnt the only Heat player who has a history with Rondo. During the Heats opening night win this season, Rondo was hit with a flagrant foul for grabbing Wade near the neck to thwart a drive. Wade called it a punk play.
During the 2011 playoffs, a contentious tie-up between Rondo and Wade resulted in Rondo sustaining a dislocated elbow.