Argentinian coach Pochettino kicks off a public training session by grabbing the microphone and leading 5,500 fans in “USA! USA” chants at the team’s training base in Irvine, California.

A moment at the end of a seemingly innocuous match in November could wind up playing a big role in the USMNT's World Cup opener

There are high expectations for Mauricio Pochettino’s side heading into the tournament.