The Celtics have begun to backslide. They need to take ownership and man up, Jayson Tatum said. His teammates echoed the sentiment.

As a dangerous January schedule looms, Boston hasn't been playing up to its standard recently, falling 4 games out of first in the East.

You probably felt a little like this if you watched the Boston Celtics’ 118-114 loss to the Philadelphia 76ers on Christmas. It was a day when Celtics fans experienced almost every emotion possible while watching their team battle it out;