Ferrari's threat to quit Formula One over the sport's proposed future regulations should be taken seriously by Liberty Media, according to former F1 boss Bernie Ecclestone.
Liberty and FOM recently revealed a blueprint for projected changes to F1's power unit regulations for 2021 with the aim of producing simpler, cheaper and louder engines. Mercedes and Renault expressed doubts over the new plans, while Ferrari president Sergio Marchionne said F1's most recognisable team "will not play" unless circumstances are favourable.
Ferrari has issued a number of quit threats in the past and failed to carry them out, but former F1 CEO Ecclestone believes the Scuderia's latest warning should not be taken lightly.