Competition hasn't even started but sponsors are already battling for Olympic gold.
Sponsors are paying big money to be a part of the games.
That has led to a crackdown on the use of symbols and phrases by smaller businesses.
Spectators are even facing rules on what they can wear and eat inside the Olympic Park.
As Monica Villamizar reports, some sponsors are paying as much as $100 million to advertise at this year's summer games.