Did you watch the Mavs-Spurs game?
Rondo was fantastic on defense, stayed in front of his man, didn't gamble, fought through picks and played the passing lanes. Yes he played against the Spurs second unit, but I haven't seen Rondo play defense with anywhere near that amount of effort since the 2010-12 playoff days. The Mavs defensive problems are from Dirk, Jefferson, and their backup Center imo.
Also, can anybody name a series where Rondo was outplayed by an opposing point guard?
Edit: He also drew 3 (4?) charges, I wouldn't have believed it if i didn't see it.