UFC 117: Silva vs. Sonnen
That sneaky Dana White. They haven't mentioned the event as USA vs. Brazil, but every single fight on the card is exactly that. Very, very interesting.
http://www.bloodyelbow.com/2010/7/21/1580945/zuffa-stealth-marketing-ufc...
Anderson Silva (26-4) vs. Chael Sonnen (24-10-1)
Ricardo Almeida (12-3) vs Matt Hughes (44-7)
Thiago Alves (16-6) vs. Jon Fitch (22-3)
Junior dos Santos (11-1) vs. Roy Nelson (15-4)
Rafael dos Anjos (14-4) vs. Clay Guida (26-11)
Thiago Silva (14-2) vs. Tim Boetsch (11-3)
... and the matchups seem to favor Brazil overall.