Our own Alan Sepinwall has spoken very highly of "The Two Escobars" by Michael and Jeff Zimbalist. You can see that film on Netflix Instant right now as part of ESPN's "30 By 30" series, and I highly recommend you do so. Alan was right about how good it was, and it's one of the few documentaries from this series that I've seen more than once. It's that dense and rewarding a piece.
Here's the first thing you need to know about Michael and Jeff Zimbalist as filmmakers. They get soccer. Football. Whatever you know it as, they understand the drama of the game, and they understand the world's relationship to it. More than that, they understand the drama of the life story of a person, and that's a hard thing to do right.
There are any number of biopics that are technically proficient, well-acted, well-cast, and utterly stiff. To tell a story using the highlights of a real person's life is very difficult, much more difficult than it seems. You can't just make it a greatest hits montage. It takes a deft touch to turn that into something really affecting, and the remarkable part of "The Two Escobars" is seeing just how good they are at all of it. They tell a hell of a story, they make it human and emotional, and they dig deep to try to show how soccer affects these countries.