Copa America officials apologised to Uruguay for a "human error" that led to the Chilean national anthem being wrongly played ahead of their Mexico clash.
Players looked bemused as the Chilean anthem was played at the University of Phoenix Stadium in Glendale, Arizona.
It may have had an early impact as Alvaro Pereira headed in an own goal in the fourth minute of the Group C clash.
In a statement, organisers apologised to Uruguay for the mistake.
"This evening during the pre-match ceremony, due to human error, we inadvertently played the incorrect national anthem," it read.
"We sincerely apologise to the Uruguayan federation, the Uruguay national team, the people of Uruguay and to the fans for this mistake.
"We will work with all parties involved to ensure such an error does not occur again."
'People will remember us because we got to No.1 in the world rankings and achieved great things - but our biggest regret is that we didn’t win anything': Ex-Everton star Kevin Mirallas opens up on 'honour' of being part of nation's golden generation
‘I’m sure we’d have finished in the top four or five if he hadn’t joined Chelsea in January. Him leaving damaged the team, but we couldn’t stand in his way’: Alan Curbishley reflects on failed Champions League dream after selling key player
