Argentina, hurt by the poor play of goalkeeper Willy Caballero on Thursday, had not lost by such a large margin in the first round since a 6-1 defeat to Czechoslovakia in 1958. Caballero gained the starting role because No. 1 keeper Sergio Romero injured his knee last month in the run-up to the tournament.

"We have to swallow the poison," Argentina midfielder Javier Mascherano said. "The game says it all."Argentina, which has not missed making the second round since 2002, has not been eliminated. But the two-time champions need to win their next match against Nigeria on Tuesday, as well as get help from other matches.

Thursday's humiliating loss came in humiliating fashion for one of soccer's most storied nations.

Caballero mangled a clearance and kicked the ball toward Croatia defender Ante Rebic, who one-timed it into the net in the 53rd minute.

Caballero buried his face in his hands while a giant television screen showed Maradona doing the same.