At least 15 police officers were reportedly injured when a post-match gathering at the Obelisk monument in Buenos Aires turned violent. The gathering began peacefully but the atmosphere changed when youths threw rocks at police and vandalized nearby businesses.
Police responded to the unrest by firing tear gas, rubber bullets and a water cannon into the crowd.
At least 50 people were detained by police.
Argentina lost to Germany in overtime on Sunday in a final score of 1-0.