Rondo jokingly suggested that the decision will depend on how he feels after he has taken a nap on Wednesday, but coach Brad Stevens revealed that his condition is improving.
"When I wake up from my nap, I'll let [reporters] know. Around 4:30," Rondo told the media.
"If I sleep really, really well tonight, and [Wednesday] afternoon with my nap, I'll let you know how I'm feeling."
The Celtics star suggested on Monday that he was 79% likely to play in the opening game as he looks to fully recover from a broken hand that he sustained in the off-season.
While the medical staff have cleared him to play, Rondo has conceded that he wants to feel comfortable with handling the ball before deciding that he will play.