What CB said, play it like a world cup final. There is no best- out-of- seven in football. It is best- out- of- one game.
"Geronimo"!!!
World cup history:
1950 USA:England (1:0)
1966 North Korea:Italy (1:0)
2006 USA:Italy (1:0)???
USA needs to score a goal somehow, corner, free-kick, penalty, sheer coincidence.
If Italy scores first, then things get difficult.
Once Italy is in the lead, it is very hard to beat them because they know how to defend their goal very very well as they usually show up with a world class defense.
Good luck, both teams, though my sympathies are with the underdogs from the exotic country
.