The Phantom Menace's "Duel of the Fates" is inarguably the most important lightsaber duel in the Skywalker saga, so much so that Darth Maul's victory would have changed the entire trajectory of the Star Wars galaxy's future. Although the Sith Lord apprentice to Palpatine slew Jedi Master Qui-Gon Jinn on the planet Naboo, Maul was defeated by Obi-Wan Kenobi and was believed to have been dead in the decade that followed before the dawn of the Clone Wars. However, one has to wonder what would have happened if Maul had slain both Jedi and emerged triumphant.

https://screenrant.com/star-wars-darth-maul-triumph-phantom-menace/