Knicks fall to Celtics on Jayson Tatum's buzzer-beater

BOSTON — The stage was set for Marcus Morris to celebrate, coming up huge late in his return to Boston. But in the end, the Knicks saw the celebration spoiled again.

After Morris hit a three-pointer to tie the score with 4.7 seconds left, Jayson Tatum answered for the Celtics, beating the buzzer with a jumper to lift the Celtics to a 104-102 win at TD Garden, dropping the Knicks to 1-5 on the season.

Morris exchanged hugs with his former Celtics teammates, blowing kisses to the crowd, but with a 29-point effort, could not leave with what he wanted most - and what the Knicks needed most.

The last-second shot ruined what had been a solid effort by the Knicks as they shifted strategies and seemed…