I never understood why people think rondo is an elite defender. We have always gotten torched by opposing teams point guards.
Multiple 1st team all-defense (voted on by coaches), top 5-6 in DPOY voting, being, statistically, one of the best if not the best in the league defensively, or maybe watching him play. He had a bad game vs the Hornets but he's generally as good as you'll see.
According to synergy sports, he defended 20 plays that ended in shots, free throws or turnovers against the Knicks. The players Rondo defended scored 12 points from those 20 plays, shooting 31% from the field. That translates into "making Toney Douglas look like an all-star" in threads like these.