James has been slowed by a sprained left ankle for more than two weeks and it's still not known whether he'll be on the floor when the Cavaliers take on the Celtics and Kyrie Irving, who asked to be traded by Cleveland this summer.
Following Monday's practice, Cavs coach Tyronn Lue said "I really don't know" when asked if James will play.
James took part in some post-practice shooting drills with teammates. He did not speak with the media as the Cavaliers prepared for their opener, a rematch of last year's Eastern Conference finals.
James has never missed an opener in his NBA career, and teammate J.R. Smith doesn't expect him to miss this one.
"Oh, he's going to go," Smith said. "He's going to go, trust me that. I don't care what he's got to do, he's going to play."
James addressed his status in a Tweet on Monday, saying 'Hopefully I can be ready to get it going.'