Five nations in one country.
The USA has the most popular teams, but the next-most popular team in the USA is Japan, followed by South Korea, Japan and the UK.
The other three nations are China, Russia and India.
The winner of the 2017 World Cup will be announced on June 1, and the tournament will feature 20 nations representing over 50 million people.
The 2018 FIFA World Cup in Russia will take place from June 11-13.