Russia vs Spain
On paper, Spain are the clear favourites, but on the day anything can happen.
Ramos and Pique have been struggling as a pair, and Russia are more than capable of capitalising on that. They might just emulate what South Korea did in 2002. Russia have performed particularly well in the group stage, but still getting past the 2010 World Cup champions would take some effort.
Prediction: Spain to win 2-1
Croatia vs Denmark
This match looks one of the most one-sided of the matches in this round. Croatia hold a visible superiority in the midfield while Denmark will be hoping for Erikson's magic and a strong performance from their defence led by their Premier League winning goalkeeper of 2016, Kasper Schmeichel. But how considering how dominant Croatia were in their group, there seems less of a chance of an upset happening in this match of the pre-quarterfinals.
Prediction: Croatia to win 2-0