A sneaky trick I often employ is I make a quick estimate of the 5 or 6 top teams in the CL and Cup near the start, and add them as a friend. It means that if I end up playing them in the bigger games near the end, I have a lot of their history to turn to. It can be a big advantage by identifying any habits they may have and their most common strategies. Even though this is a two-way thing, I don't mind if people look at my results. This is because I don't have a set formation as such, and I adapt to each match accordingly.
An example of this is this seasons CL final.
Opponents stats-screen-shot-2015-06-24-11.24.38-pm.jpg

I added 2 main players (1 got knocked out early) and another strong opponent was in my group already. As you can see I now have access to all of Rainny FC's games.

Try it out next season if you want