From outside in complicated to explain but you have to understand the locals obsession about fútbol.
We dont really have American football, baseball has a small following and basketball is a minor sport so all the people really have to root for is soccer. Its the only national sport. It is said that the three most important things in a Costa Rican mans life are soccer, women and beer, but not necessarily in that order.
Some of the ticos says jokingly, If we win well all get drunk. If we tie well get drunk and if we lose well all drunk. La cerveza arregla todo (beer fixes everything).
May the best team win!