BOSTON — The Boston Celtics got their first win of the season, holding off the New York Knicks 107-103 behind an incredible night from Jayson Tatum.

The teams went back-and-forth in a foul-filled first quarter that ended with the Knicks up one. The Celtics opened the second on a 10-4 and flipped the halftime score, going up one at the half thanks to a balanced attack. They reopened an eight-point lead in the third, their largest to that point. Miles McBride kept the Knicks close, but the Celtics closed the quarter on a 13-4 run to open up a 10-point lead. They maintained that to start the fourth, but the Knicks got within one again. This time, Jayson Tatum hit three big buckets to hold the Knicks off.

Box Score

What Went Right

Tatum on track : He got off to a good start offensively, putting up seven points, five rebounds, and two assists in the first quarter. He carried that good start to a monster, do-it-all night.…