Organizers of a soccer match between El Salvador and Argentina have apologized for playing the wrong anthem. 

Instead of playing El Salvador's national anthem before an exhibition game against Argentina, the organizers of the event played the Manx anthem “The Isle of Man.”

A reported by The Associated Press, the members of the Salvadoran soccer team looked confused on Saturday night when the wrong music came blaring out of loudspeakers at FedEx Field.

Demonstrating their understanding that something was amiss, several of the players slowly dropped their hands from their chests, while a good number of Salvadorans in the crowd whistled their disapproval and disgust.

More than 50,000 spectators were inside the FedExField stadium in Maryland, anxious to enjoy the exhibition match between El Salvador and Argentina.

CMS Sports has expressed their regret over what they have described as an "unfortunate incident," and they said they have taken "full responsibility” for what they called an “honest mistake."

CMS Sports added that it would take steps to prevent this from happening again, and that the occurence "was not done with malicious intentions."

As reported in the BBC, “Ellan Vannin” (the Manx name for the anthem “The Isle of Man”) and the proper El Salvador anthem are right next to each other on the play list.

After the match, Salvadoran coach Albert Roca made no mention of the mix-up in anthems.

Argentina, who was playing without the help of Lionel Messi, won the game 2-0. Ever Benega and Federico Mancuello both made goals.

This is not the most notable anthem mix-up at a world sporting event.

In 2012, Kazakhstan's shooting team was shocked when a spoof national anthem that was used in the comedy “Borat” was played at a medal ceremony in Kuwait.

As reported in the Guardian, the team demanded an apology as the song featured lyrics about prostitutes and potassium exports.