I think the biggest problem is that after most of the tournament the US went youth and did very well. In the final the coach put more experienced starters out there saying they would be better suited to the pressure Mexico uses. After Pulisic ran through the Mexican defense for the entire first half, Mexico adjusted and tried to deny him getting the ball. The US attack suffered. The US tried to get the offense through Bradley and Altidore, Mexico made them look old and slow. I think the US should have stayed with the youth that got them there.