Belated trivia fact of the day.
Uruguay won the first ever World Cup in 1930 (as everyone, I'm sure, knows) beating Argentina 4-2 in Montevideo.
What is not so well-known (maybe) is that because of a dispute, a different ball was used in each half, one chosen by each team. Argentina's ball was used for the first half, and Uruguay's ball was used for the second half.
Funnily enough Argentina were leading 2-1 at half time. Obviously the Uruguayan ball was superior.