Alternatively, if you manage to earn the first place - which would constitute a shock no doubt, you will face the second of group F. It could be Croatia or more likely Australia. It will be interesting to see US vs Australia.
The US ranks much higher than Australia, but Australia's first team has more players paying at the very top of soccer leagues. I have read posts from Australian soccer friends on some other boards, and they (in good-natured arguments) joke that their team is good enough to beat the US team.
The Aussies have made some nice strides but they don't have the depth and the coaching matched with the discipline to beat the US IMHO.
It would be great to see it happen though.