The Indiana Pacers held leading scorer Paul George out of contact during Thursday's practice and his status remains uncertain for Game 3 of the Eastern Conference finals on Saturday.
George, wearing a red vest, participated in shooting drills after suffering a concussion on Tuesday night.
The Pacers are not likely to determine whether George is cleared to play until hours before Saturday's game in Miami, but Yahoo Sports reported Thursday night that the Pacers are growing more optimistic that he will be available.
The best-of-seven series is tied 1-1 after the Heat's 87-83 victory in Game 2 in Indianapolis.
George was dazed in the fourth quarter on Tuesday night after he was kicked in the head by Miami guard Dwyane Wade during a scramble for a loose ball. George blacked out and had blurred vision but did not inform the team of his symptoms and went back into the game after a timeout.
Tests on Wednesday revealed that George had sustained a concussion. In order to resume playing, he will be required to pass tests by the team doctor and NBA neurologist.
George finished with 22 points, five rebounds, five assists, two steals and four turnovers on Tuesday night.
"I think every last player in the Final Four would have played through it," James said of George's concussion. "This is the conference finals, and obviously, a concussion is very serious. Our concussion test is not as extensive as the NFL. It doesn't happen as much. I think all of us would have played through it under the circumstances."