Internazionale and Telecom Italia have reportedly been ordered to pay Christian Vieri €1m (£800,000) in damages for spying on the player through phone taps.
The Ansa news agency and the Gazzetta dello Sport reported that a Milan court made the decision on Monday.
Vieri filed a lawsuit against his former club and Telecom Italia for a combined €21m in damages five years ago, after word leaked that they had spied on him to monitor his life off the pitch.
Vieri said that when details of the alleged spying became public in 2006, it damaged his playing career by causing him undue stress.
Vieri, who is now retired, played for Inter from 1999 to 2005.