If you thought Uruguay’s national soccer team players looked confused before their Copa America game against Mexico, that’s because they were.

University of Phoenix Stadium in Glendale, Ariz., played the wrong national anthem for Uruguay on Sunday as the players were lined up on the field. Chile’s national anthem was played through the speakers, leaving the Uruguayan players baffled.

Mexico did play Chile on June 1 in an exhibition game, but that game took place in San Diego. Chile stayed in California, too, to take on Argentina in their first Copa America matchup on Monday at Levi’s Stadium in Santa Clara, Calif.

Needless to say, Uruguay’s players weren’t too happy. New England Revolution midfielder Diego Fagundez, who’s Uruguayan-American but doesn’t play for the national team, took to Twitter to voice his displeasure.

Copa America organizers released a statement Sunday apologizing for the incident.

The correct national anthem was never played in what ended up being a 3-1 loss for Uruguay.

Thumbnail photo via Joe Camporeale/USA TODAY Sports Images

Thumbnail photo via Jun 5, 2016; Glendale, AZ, USA; Uruguay players look on during the national anthems prior to facing Mexico during the first half during the group play stage of the 2016 Copa America Centenario at University of Phoenix Stadium. Mexico won the match 3-1. Mandatory Credit: Joe Camporeale-USA TODAY Sports