Grant Wahl, 48, collapsed as extra time began in the Argentina-Netherlands game on Friday night.
Mr. Wahl's wife, Céline Gounder, wrote in a tweet that she was "completely in shock" and expressed her gratitude for the support from friends.
"On the night before the USA-Netherlands game, what had been a cold for the previous ten days morphed into something more severe, and I could feel my upper chest take on a new degree of pressure and discomfort.
HE SAID :
"We are in contact with the US Embassy and the appropriate local authorities to make sure the body is returned in accordance with the family's wishes.