For anyone on here who's into rugby, there are free tickets for expats to one of the Super Rugby matches next week. They take you to the stadium too:
http://www.turismo.buenosaires.gob.ar/en/article/free-tickets-going-argentinanew-zealand-super-rugby-clash
http://www.turismo.buenosaires.gob.ar/en/article/free-tickets-going-argentinanew-zealand-super-rugby-clash