Joel Embiid popped up from a pregame fall and scored 27 points with nine rebounds to lead the Philadelphia 76ers to a 118-114 victory over the Boston Celtics.

Joel Embiid and the Philadelphia 76ers react to the win over the Boston Celtics as they begin to turn the corner.

What to KnowThe Celtics have lost back-to-back games for the first time all season.Jayson Tatum was the Celtics' best player with 32 points and 15 rebounds.Caleb Martin scored a season-high 23 points and hit 7-of-9 attempts from 3-point range.Tyrese Maxey led the Sixers with 32 points and 12 assists. The Celtics will be back in action against the Pacers on Friday and Sunday at TD Garden. The Boston Celtics' defense let them down in their Christmas Day loss to the Philadelphia 76ers at TD Garden. This game was tied 82-82 after three quarters, and then the Sixers opened the fourth quarter with an 18-4 run. The Celtics were able to trim that lead to three points with 2:27 remaining, but they couldn't finish the comeback as Philly escaped with a 118-114 victory. Check out our live blog below for a complete recap of the game.

Tyrese Maxey gave the Celtics more than they could handle in a Christmas Day showdown on Wednesday, as the 76ers earned a signature 118-114 win at the expense of their defending champion rivals. Here are the takeaways.

Tyrese Maxey collected 33 points and 12 assists to lead the visiting Philadelphia 76ers to a 118-114 victory over the Boston Celtics on Wednesday.

Tyrese Maxey drops 33 points in the 76ers' Christmas Day win over the Celtics.

Boston Celtics center Kristaps Porzingis injured his ankle during a 118-114 loss against the Philadelphia 76ers on Wednesday night. Porzingis seemingly got hurt just 65 seconds into the contest, slipping near the top of the key while trying to create separation with a step back.