What was the reason for Messi not greeting Bolivia's captain?

Chumacero started greeting while the Argentinian anthem was being played

What was the reason for Messi not greeting Bolivia's captain?
What was the reason for Messi not greeting Bolivia's captain?

Chumacero started greeting while the Argentinian anthem was being played

It was one very curious anecdote of the game between Argentina and Bolivia this week, that took place before the game. Bolivia's captain, Chumacero, went to greet, as it is usually done, Messi and the Argentinian players but Barça's crack didn't greet him and told him something.

The reason for that unusual scene that was widely commented on the social media is that Chumacero went on to greet while Argentina's anthem was still playing. The referees and Messi told him about it and the Bolivian stepped back in what was a comic situation. Eventually, the anthem was played, they greeted once more and the game was played with normality.