Crossover boxing is a type of boxing that involves fighters from different backgrounds or disciplines, such as YouTubers, celebrities, or athletes from other sports. These fights have become increasingly popular and are seen as a way to market the sport to new audiences. Crossover boxing events are often viewed as novelty events and are not considered professional boxing matches. Fighters in crossover boxing events are ranked separately from professional boxers, and rankings are based on factors such as wins/losses, fighting style, and participation in big attraction bouts. The top crossover boxers are ranked in a pound-for-pound list. Some of the most famous crossover boxing events include KSI vs Logan Paul, Floyd Mayweather Jr. vs Conor McGregor, and Roy Jones Jr. vs Vyron Phillips. Crossover boxing has been criticized by some for being a spectacle rather than a legitimate sport, but it has also been praised for bringing new fans to the sport of boxing.