The Duel () is a 2000 Hong Kong film directed by Andrew Lau, of Storm Riders fame. It is based on Before and After the Duel, a Wuxia novel by Gu Long. The film is known for its humorous take on the famous story as well as for its brilliant special effects.

Plot

The plot revolves around Nick Cheung's character "Dragon Nine" who is attempting to solve a mystery in the days before the world's two greatest martial artists are slated to fight a duel atop the roof of the Forbidden City. Though this film was made as a Lunar New Year project, which usually signifies a greater emphasis on fast-paced fun than on meticulous artistry, the film is nevertheless visually stunning and maintains a fairly coherent plot, thanks both to the talented cast and crew and to the strong source material.
As Dragon Nine investigates, a murder plot is exposed, causing many people to die, knowing too much about the plot. It is revealed that one of the martial artists, Cool Son, was the murderer.