BOSTON — The return of Al Horford to the TD Garden — at least to play in a game — may have to wait beyond tonight’s game betwween the Boston Celtics and Horford’s new team, the Philadelphia 76ers. 

Team officials said Horford is questionable for tonight’s game due to soreness in his left knee and tightness in his left hamstring. 

Horford, who will address the media prior to tonight’s game, was the Sixers’ major offseason signing when they inked him to a four-year, $109 million deal.

Not only did Philly add one of the better stretch big men in the NBA, but they weakened a divisional rival (Boston) in the process. 

Philadelphia (18-7) comes in playing some of its best basketball of the season while riding a three-game winning streak.

Don't miss NBC Sports Boston's coverage of Celtics-76ers, which tips off Thursday at 7 p.m. with Celtics Pregame Live, and then Mike & Tommy have the call at 8 p.m. You can also stream the game on the MyTeams App.