Point guard Rajon Rondo has reached an agreement in principle to extend his contract with the Boston Celtics, according to a Yahoo Sports report citing Rondo's agent Bill Duffy and league sources that say the five-year deal is worth at least $55 million.

Had a deal not been reached before the end of today, Rondo would have become a restricted free agent at the end of this season.

Rondo, in his fourth year, scored 6 points with 10 assists and 3 steals during Sunday's matchup against the New Orleans Hornets, and had words with rival point guard Chris Paul, beginning in the 2d quarter when both were given technical fouls.