Sebastian Vettel may have been half-joking when he made a plea for help in finding a phone number for the "grip guy" after the Monaco Grand Prix, but it is clear that his Ferrari team thinks its problems in 2019 are mostly tyre related.
Ferrari has dug deep into what has gone wrong over the early stages of the current campaign, and its conclusions are that it has not gone the wrong way with its car concept or that it has a fundamentally bad design. Instead, Ferrari's biggest headache is that it cannot switch on its tyres as well as others.
Finding itself outside the prime operating window for the tyres at times has left Ferrari lacking the ability to extract performance, especially in slow-speed corners - an area where Mercedes is able to do so beautifully. Ahead of the Monaco race, Ferrari team principal Mattia Binotto suggested that his team in particular has been caught out by the impact Pirelli's new thinner tread tyres for 2019.