Remember those rumours and news of Benfica being corrupt and stolen e-mails being used to "prove" it?
Portuguese courts sentenced Porto to pay 2M to Benfica for slander and publishing private information and trade secrets, to cease any action of divulging or spreading of such information and to deliver any and all information it has to Benfica.
Most of the information divulged by Porto, while true, was found to be heavily adulterated and truncated beyond recognition, in an continued effort to paint Benfica in a bad light and spread an untrue story of corruption.
What's more, all these acts were considered unfair and unlawful competition. Which, if pursued to the last consequences, may end up with a relegation or exclusion from european competitions.