According to a message seen by Reuters, the hedge fund told the Commission that the Rome government would likely discuss revoking Atlantia's motorway concession at a meeting on Friday.

"The risk that the Italian government puts its threat to execution and withdraws the concession despite the obvious EU Treaty infringement is somewhere between serious and high," said TCI in its message.

(Reporting by Stefano Bernabei, writing by Francesca Landini)