When you always play with the same people, it all comes down to one question: who's winning? Rivalries keeps score for you.
Nothing to switch on. As you play matches against the same rivals, the app builds up the head-to-head.
The rival you've faced most often is marked as EL CLÁSICO. Usually the match everyone talks about.
For each rival you see the meetings and who dominates: you, them, or dead even.
One match isn't a rivalry. If nothing shows up yet, you haven't repeated rivals enough.
Rivalries is free. It comes from your league's matches, so the more you play, the better it gets.