Sixers head coach Doc Rivers indicated Saturday that Embiid (knee) didn't do anything in practice and stated he would label the center "doubtful" for Game 1 against the Celtics on Monday if he "was a betting man," Tim Bontemps of ESPN.com reports.

Embiid's absence from practice certainly doesn't bode well with Game 1 just two days away, and Rivers' comments don't provide an outlook that is any rosier. The team will release its official injury report for the contest Sunday, at which point we'll get an official sense of the big man's chances of suiting up.