BOSTON -- The Boston Celtics' worst fear is now a reality.
Rajon Rondo, the NBA's assists leader, will miss the remainder of this season with a torn right ACL.
Rondo, a late-game scratch from Sunday's game against Miami, learned the severity of his injury following an MRI performed at New England Baptist Hospital.
According to a team official, the four-time All-Star suffered the right knee injury against Atlanta in the fourth quarter on Friday.
Following the MRI results, Rondo returned to the TD Garden but team officials said he would not be addressing the media.
A day for his surgery has yet to be determined.
Replacing him in the starting lineup on Sunday was Courtney Lee, who was coming off one of his strongest games of the season. Lee had 16 points off the Celtics bench against the Hawks and has been one of the team's top perimeter defenders of late. However, Lee struggled through the first three quarters on Sunday, tallying just four points on 1-for-7 shooting.
Tune in to Celtics Postgame Live on Comcast SportsNet immediately after this afternoon's game for all the updates on Rondo's knee, and how the Celtics will react to losing their star point guard.
More to come . . .