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

The Celtics fell to 6-5 in December after a 118-114 loss to the 76ers in a Christmas clash at TD Garden. "We've got to look in the mirror," said Jayson Tatum.

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

The 76ers visit the Celtics on Christmas Day! It's time to continue our NBA odds series with a 76ers-Celtics prediction and pick.

A slow start from the Boston Celtics in their Christmas Day game against the Philadelphia 76ers left the Boston Celtics fighting an uphill battle and eventually consigned them to their eighth loss of the season.

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.

A lackluster defensive effort caused the Celtics to come up short. The post Tyrese Maxey torches Celtics’ defense as 76ers beat Celtics on Christmas: 9 takeaways appeared first on Boston.com.

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.

As Joel Embiid writhed in pain on the ground, a cohort of Sixers staffers stared in disbelief. The game hadn’t even started yet. It was just warmups. But somehow, Embiid managed to stumble on a security guard’s foot and twist his ankle less than an hour before the 76ers’ Christmas Day game against the Celtics.