Put in the 'group of death' along with Ghana, Germany and Portugal, last night they were just seconds away from qualifying for the knock-out stage before Silvestre Varela equalised for Portugal.
In what was a roller-coast match, the growing 'soccer' fanbase in the United States appeared to be enthralled by every twist and turn.
Supports of Team USA have travelled in huge numbers to Brazil ensuring fantastic atmospheres at their games so far. Well attended fan parks have also been spreading back home.
These images from last night show just how excited they've been getting.
USA fans watch United States vs Portugal
Show all 14
Which fans do you think have been the best at the World Cup? Let us know in the comments below.
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies