Major League Soccer was established in 1993 as part of the United States` successful bid to organize the 1994 FIFA World Cup.  The first season took place in 1996 with ten teams.  MLS experienced financial and operational difficulties in the early years, lost millions of dollars and lost two teams in 2002.  Since then, developments such as the broadcast of football-specific stadiums in the league, the introduction of the Designated Players Rule, which allows teams like David Beckham to hire star players, and domestic TV deals have made MLS profitable.  With an average audience of more than 20,000 per game, MLS has the third highest average visitor number of any professional sports league in the United States. after the National Football League (NFL) and Major League Baseball (MLB)  and was until 2013 the seventh most visited professional football league in the world.  Since 2018, the reigning MLS Cup champion has been playing in the Campeones Cup, a single match against the Campeón de Campeones of the MX League, organized in September by the MLS team.  In the first edition, Tigres defeated UANL Toronto FC on September 19, 2018 at BMO Field in Toronto by a 3-1.  Another inter-league competition with the MX League, the Coupe des Ligues, was launched in 2019.
The 2020 edition of the tournament was originally planned to pair eight MLS clubs against eight MX league clubs in a single elimination tournament held in the United States and revive a league rivalry that previously took place in the now-non-existent North American Superliga before being canceled.  Of the three teams that made their MLS debuts in 2017 and 2018, one opened a football-specific stadium in 2019, a second plays in a common football stadium and the last opened a football-specific stadium for its 2018 opening season. Minnesota United FC, which debuted in 2017, built Allianz Field in St. . . .