Spain vs France.
Most predicts forecast France to the final, and I wouldn't dispute that. However-though it happens very rarely-there have been instances where a team considered the overwhelming favorite ended up losing. I have seen such an upset ; the team was France.
Ultimately, data is merely a collection of fragments from a past that cannot be reclaimed. Moreover, since it is impossible to gather everything from the past, we are simply collecting the data that happens to be available.