CNN -- T
he excitement is building for Team USA's big World Cup match against Portugal on Sunday.
Portugal's star Cristiano Ronaldo may not play.
And we know that one of America's best players, Jozy Altidore, is out.
Still, Sunday's contest is sure to be another ratings grabber with World Cup fever now sweeping the country.
Fans in Chicago and New York have certainly caught futbol fever!
A record 16 million viewers tuned in for Monday's match against Ghana.
The US team is still a long shot, but still in the hunt.
World Cup frenzy has also taken over social media with 4.9 million tweets worldwide.
The #WorldCup on Instagram is going viral with more than 2.3 million posts.
In the end, it doesn't matter if itâ??s the thrill of victory or the agony of defeat, it's GAME ON.