FIFA World Cup 2018: 5 Rivalries to keep an eye out for at the tournament 

#2 Portugal vs Spain

The winner of Spain versus Portugal could decide who will top Group B

Known as the Iberian Derby, this is one clash which we are guaranteed to witness as both the sides are in Group B.

And they are both favourites to go to the next round as the other two spots are filled up by Iran and Morocco. Only question is - who will top the group?

This is one of the oldest rivalries and dates back to 1921! Winner of tomorrow's game could well top the group and Spain were one of the favourites to win the Cup. Spain sure have a better squad of the two, but Portugal are no pushovers.

However, with the change in manager yesterday, many believe that Spain would crash out in the group stage itself.