The Road to Rio series consistes of five caches. You'll need to find the first four in order to get to the final and win the trophy. The first cache is The Tricky Group Stage. Often, by sheer fluke, a group of highly-ranked teams end up playing one another in the opening group stage. This means that two of the 'better' teams in the world will miss out on the later stages of the competition. The first cache commemorates this regular occurance.
When you locate the cache, please take note of the two teams whose flags are contained within. These will help you to find the Final Cache.
Good luck - try to score one more than them!