Philadelphia 76ers star Joel Embiid has passed concussion protocol and there is "optimism" about his participation in Friday's Game 3 against the Miami Heat, according to reports.

Embiid has not played so far in the second-round series, which the 76ers trail 2-0 after a defeat on Wednesday.

Tyrese Maxey did his best to make up for the Cameroonian's absence, scoring 34 points, but Heat center Bam Adebayo (23 points and nine rebounds) enjoyed another big night as Miami secured a 119-103 victory.

The 76ers will look to get on the board in Philadelphia on Friday, but doubts remain around the availability of their MVP candidate, who suffered a facial fracture and concussion against the Toronto Raptors in round one.

Embiid is currently listed as out for Game 3, but according to The Athletic's Shams Charania, he cleared concussion protocol earlier on Friday and also participated in the team's shootaround, with Charania saying there was "optimism" about his chances of featuring in Game 3.

Coach Doc Rivers was unable to offer any assurances on Thursday, telling reporters: "I really don't know [if Embiid can play].

"We talked [on Tuesday], and we talked [on Wednesday]. He looked good, as far as talking... we just have to wait and see."

In the first round against the Raptors, Embiid averaged 26.2 points per game across his six appearances, with 11.3 rebounds per game.