Vegas betting has the US as a pretty big underdog (bet $100 to win $250 for USA victory). Most likely these odds represent some overly favorite USA sentiment so the odds for a victory on the field might be less than the odds at the casino’s. Sporting news puts the chance of a US victory at 13.1%, a longshot. (Link)
So on paper it ends tomorrow for the US soccer team, luckily the match is played on the field! The US has been playing well overall and better than expected. This will be the biggest game in the history of soccer in the US, should they pull this game off the interest in soccer will rise tremendously.