F1: FIA Not Ruling Out Rosberg Penalty, Marko Talks Of ‘Secret Testing’

The FIA is not ruling out penalties, after stewards on Sunday investigated Mercedes' secret Barcelona tyre test.

Before the Monaco grand prix, Red Bull and Ferrari filed an official protest, arguing the three-day test with a 2013-spec car was a breach of the sporting rules.

Having conducted an investigation after Sunday's race, the FIA confirmed it knew Pirelli wanted to do the test, but only gave a conditional green light in the event "every team is offered the opportunity" to also test.