But Maxey zipped past Pritchard and found a clear lane to the basket, where he put in an off-balance layup just before time expired. The play all but finished off the Celtics in this 118-114 loss, and it was an example of the uncharacteristic missteps that doomed them.

Yet another lower-leg injury sent Kristaps Porzingis to the locker room during the Celtics’ Christmas Day matchup with the 76ers.