According to Argentine defender Martin Demichelis, Braziilians were outside the team's hotel setting off fireworks until after 4am local time on Sunday morning.
Here's the tweet from Demichelis.
Aunque nos hayan tirado bombas hasta las 4 de la mañana para no dejarnos dormir.hoy unidos 40.000.000 por la gloria!! pic.twitter.com/qXRLmGWiIk— Martin Demichelis (@demichelisok) July 13, 2014
There's nothing quite like the time honored sports tradition of fans doing everything they possibly can to disrupt the team you want to lose a big game.
It's also a great reminder of how badly Brazilians do not want Argentina to win the World Cup in their country.