User blog comment:MilitaryBrat/Lord Voldemort vs Darth Vader/@comment-2006360-20111218030426/@comment-181289-20111219022056

Actully Dooku beat Windu is sparring matchs while he was still in the order, the only person to do so other than Yoda, and during the clone wars aside from Yoda, only Windu would have been his equal on neutral ground, so he is just as good if not better than Windu.

On Palpatine not being able to keep up with Windu, I beleive that was jsut as much an act to fool Windu as Anakin, Palpatine defeated Yoda, who was the only Jedi other than Dooku to best Windu in a duel. The only duelest I'm aware of that is a complete match for Windu, as in niether can catully over come the other is Qui-Gon Jinn.