Historically, it looks as though clean sheets and conceding the fewest goals is the key to winning World Cups. So which team has the most solid defensive unit, with a good goalkeeper? Then also their ability to manage moments in the tournament and how they will gather momentum in the group stages. My top two are Brazil and Argentina - and I would say Brazil will win because they are fully loaded in every position and defensively they are the strongest I have seen them in many, many years.