Late in the first quarter, Allen walked over to the Celtics bench on his way into the game to greet his old mates, but Garnett, who claimed over the summer he had lost Allen’s phone number, didn’t respond. When Allen patted him on the shoulder, Garnett shrugged like a fly had buzzed in his left ear.After the game, Garnett explained that he’s “an intense person” and he was “just trying to play the game, man.”