The pair took time out from preparing for their respective World Cup campaigns to be quizzed over one of the main strands of the affair, the dealings of GEA World, Italy's largest firm of football agents.

Four GEA directors face charges of using threats and violence in their dealings in the transfer market.

The company is run by Alessandro Moggi, the son of former Juventus general manager Luciano Moggi whose taped conversations with the head of the Italian referees' association triggered the scandal engulfing Italian football last month.

Moggi was heard telling Pierluigi Pairetto which referees he wanted assigned to certain league and European matches.

Both Cannavaro and Trezeguet were appearing as witnesses over their transfers to Juventus -- the club in the eye of the storm -- which were handled by GEA.

"Prosecutors were satisfied with my answers to their questions," Cannavaro said after the two-hour hearing.

Cannavaro's lawyer, Giovanni Andrea Anfora, added: "The meeting was very cordial and relaxed. Cannavro answered all the questions which were put to him."

Trezeguet was next up before the panel, with his hearing also lasting around two hours.

"Everything went fine. I'm satisfied and now I can set off calmly for the World Cup," said the France striker.

Trezeguet was tackled on whether he'd be staying at Juventus if the Italian champions were found guilty of match fixing and demoted to the second division.

He told Ansa news agency: "It's a little early to talk about my future, we'll wait to see the outcome of the investigation."