Predicting the remaining results I reckon that the last 16 will look like this
Top Half of the Draw
Swiss v Poland
Spain v Iceland
Wales v Albania
Portugal v Belgium
Bottom Half of the Draw
Italy v Croatia
Germany v Slovakia
England v Hungary
France v N Ireland
If my guess in right the bottom half looks a lot tougher then the top half with 4 Previous World Champions in that half
Top Half of the Draw
Swiss v Poland
Spain v Iceland
Wales v Albania
Portugal v Belgium
Bottom Half of the Draw
Italy v Croatia
Germany v Slovakia
England v Hungary
France v N Ireland
If my guess in right the bottom half looks a lot tougher then the top half with 4 Previous World Champions in that half

Some very bizarre logic on this forum