Argentina. It will be a great way for Lionel Messi, the best player in the world, to go out. It could be a defining moment for him - he has probably been the greatest player we have ever seen, but the thing that is always chucked at him when comparisons are made between him and Diego Maradona is that he has never won the World Cup. If he was to win this one, that would pretty much be the end of that debate - and what a story it would be.