Former Ferrari technical manager Nigel Stepney has accused the Formula One team of waging a dirty tricks campaign against him amid legal proceedings and allegations of sabotage.

"I have confidence I'll be cleared by the legal process that is now taking place," the 47-year-old Briton told the Sunday Times newspaper.

"It is just part of a dirty tricks campaign and everything is in the hands of my lawyer, so we'll wait and see what happens."

Ferrari said on Thursday that they had started court action against Stepney, who remains an employee, but declined to give details. A spokesman said they had also started internal disciplinary procedures against the Briton.

Stepney said in February that he was open to offers after expressing unhappiness at management changes following the departure of technical director and compatriot Ross Brawn.

He was moved to a new role, in charge of team performance development and away from the racetrack, before the start of the season in March. The Briton has also been linked to a possible switch to struggling rivals Honda.

Stepney had previously played an important role in leading the pit crew at races after joining Ferrari in 1992 as chief mechanic. His time at the team coincided with Michael Schumacher's golden period there.

Italian and British newspapers have mentioned a mysterious white powder that was allegedly found in the petrol tanks of the Ferrari race cars six days before this year's Monaco Grand Prix.

The Sunday Times said Italian police had also searched Stepney's house near the Maranello factory and left with a small container.

A Ferrari spokesman refused to comment on the speculation on Sunday, other than observing that "clearly there are a few papers that are very well informed".

Stepney, holidaying in the Philippines with his partner and child, dismissed suggestions that he had fled the country.

"Why would anyone say I am not contactable," he told the Sunday Times. "I booked the flights through the Ferrari travel office. They know where I am."