Sorry, guys ... IMHO ... The Adventures of Robin Hood, 1938, sword fight between Errol Flynn and Basil Rathbone is "the" cinematic sword fight masterpiece to which all other should be compared.
Adding to the adventure and heightened viewer awareness of being completely drawn into the fight, Michael Curtiz's use of light and shadows is a testimony to cinema art at its finest.
Flynn and Rathbone the quintessential good vs. evil, the hero fighting for right, justice, and protecting the poor and innocent. This is the sword fight sequence, "par excellence", all the way from the beginning, the winding stone staircase, the disadvantage, losing the sword that the bad guy prevents the hero from retrieving while the hero very chivalrously allows the bad guy to retrieve his sword when dropped.
Then, of course, when the hero is nicked with the bad guy's blade we all know how it will end even though the bad guy is reaching for his dagger during close contact in what is supposed to be a "fair" fight.
Beside that ... NO stunt doubles or stand ins. Flynn and Rathbone really did the entire scene, albeit, was likely in several takes edited together.
Not even Douglas Fairbanks had done it better although much was borrowed form Faribanks personna for this scene.