The World Cup brings out the most ardent fans of the game each tournament. And in Sochi, Russia, there's one fan who is so devoted that he has opened his own museum. June-wei Sum has more.

The spills and thrills of the game - but what's football without well, a ball. That's what this retired football referee in Russia thinks, and he's backed that up by opening his own Museum of Football in Sochi - one of this year's World Cup host cities.

MIKHAIL KOSHELEV FOOTBALL COLLECTOR "There isn't a single football museum anywhere in the world. This is strange because the ball is the essence of the game. There is no ball, there is no game. There is no ball, there is no Pele, there is no Ronaldo, there is no Messi."

The museum showcases Koshelev's personal collection of over 800 balls, collected over 30 years. It's fascinating to hear him tell the stories behind them.

MIKHAIL KOSHELEV FOOTBALL COLLECTOR "In 1930, there were no rules governing the size and the weight of the ball. The teams agreed to use different balls. The first half was played using the ball of Argentina, Tiento. The other half was played with the ball of the Uruguay team, T-model. In the first half Argentina won, but when the ball was changed the Uruguayans played the ball they were used to, they won 4-2 and became world champions. After that FIFA decided to introduce regulations ruling that matches were to be played using the same ball and from 1934 the same ball was used for the whole game."

And he says that even the now-familiar black and white football pattern, didn't come about until 1962. Until then most balls were brown. Then, black and white TV came about and broadcasters needed a higher visibility ball. And as we see, that pattern has stayed with us - even in HD color. June-wei Sum, CGTN.