Rathbone supposedly said that when he made the Court Jester, Danny Kaye was the best naturally gifted on screen opponent he’d ever met, able to basically copy any of the moves they had to make just by watching Rathbone himself do them once... or alternatively, that Kaye was the first on-screen opponent who was too fast for Rathbone to keep up with at 63, so the instructor had to stand in for him a few times.
Though in hindsight, the fact that a great duelist like Rathbone barely ever got to win any of his on-screen fights is a shame.