Who is the best football team in the world?

In terms of results, I'd say the best club is Barcelona. However, many people say their favorite club is the best, even if it is not too successful!

Which is the best football club? (soccer is American but we invented football before they moved to America, so they can change the name of their sport). And "the best" is the one who is winning, I think at the moment it's Manchester United. :)