A man linked to the Football Leaks disclosures which prompted investigations into the Manchester City and Paris St-Germain clubs has been charged with 147 offences in Portugal.
Rui Pinto, 30, is accused of crimes relating to unauthorised access to data and attempted extortion.
He says he acted in the public interest and should not face trial.
Football Leaks was set up to expose alleged corruption in the sport by releasing confidential documents.
Mr Pinto was held in January in Hungary on a European arrest warrant issued by Portugal and later handed over to the Portuguese authorities.
The charges mostly relate to alleged illegal access to data, aggravated extortion, violation of correspondence and computer sabotage.
The prosecutors in Portugal said in a statement that Mr Pinto “used various computer programmes and digital tools to enter, in an unauthorised and anonymous manner, the computer systems or email boxes and remove content from it”.
Mr Pinto, a Portuguese national, has been described as a “computer genius” by local media.
His defence lawyers characterise their client as a “very important European whistleblower”
A trial date is yet to be announced.
It was launched in 2015 to uncover alleged corruption taking place in football.
Football Leaks provided millions of documents and more than 3.4 terabytes of information to media outlets in the European Investigative Collaborations (EIC) consortium.
The documents were used as the basis for media reports that made damaging allegations against England’s Manchester City and Paris St-Germain (PSG) of France.
Europe’s football governing body, Uefa, later launched investigations into the finances of both clubs following the leaks.