The best duel in cinema history is:

Robin Hood vs Sir Guy of Gisbourne (The Adventures of Robin Hood - 1938)
Diego Vega vs Esteban Pasquale (The Mark of Zorro - 1940)
Wołodyjowski vs Kmicic (The Deluge – 1974)
Gabriel Feraud vs the mayor's nephew (The duelist - 1977)
Luke Skywalker vs Darth Vader (Star Wars: Episode V - The Empire Strikes Back - 1980)
Inigo Montoya vs Dread Pirate Roberts (The princess bride - 1987)
Rob Roy MacGregor vs Archibald Cunningham (Rob Roy - 1995)
Zorro vs Harrison Love (The Mask of Zorro - 1998)
Zorro vs Elena (The Mask of Zorro - 1998)
Qui-Gon Jinn & Obi-Wan Kenobi vs Darth Maul (Star Wars: Episode I - The Phantom Menace - 1999)
Yu Shu Lien vs Jen Yu (Crouching Tiger, Hidden Dragon - 2000)
Maximus vs Kommodus (Gladiator - 2000)
Jack Sparrow vs Hector Barbossa (Pirates of the Caribbean: The Curse of the Black Pearl - 2003)
Nathan Algren vs Uijo (The Last Samurai - 2003)
Hektor vs Achilles (Troy - 2004)
Kai vs soldiers (47 Ronin - 2013)
Kenshin v Sojiro (Rurōni Kenshin 2- 2014)
Błażej Wronowski vs Dymitr Repnin (Born for the Saber - 2019)
Geralt vs Renfri's band (The Witcher 2019)