Sebastian Vettel believes that this weekend's Spanish Grand Prix will provide a good reference about Formula 1's pecking order in 2016 - and where Ferrari stands within it.
Vettel and Ferrari have had a mixed campaign so far, securing podium finishes in Australia and China but failing to start in Bahrain due to a power unit problem.
Vettel's Russian Grand Prix was also truncated after twice being hit by Daniil Kvyat on the first lap, the latter touch proving terminal to the German's hopes.
The incidents, combined with Nico Rosberg's flawless start, has left Vettel 67 points behind his compatriot in the standings.
"Barcelona is a very good indication of where you are with the car," said Vettel, who claimed victory at the race in 2011.
"We can see a good reference where we stand, therefore it is incredibly important to get all the details right because you know that track so well.
"It is very important to get everything together to be able to perform highly."
Vettel added that the nature of the Circuit de Barcelona-Catalunya makes it demanding on tyres, with Pirelli having selected the three hardest compounds for this weekend's event.
"You have a lot of corners, high-speed corners, low-speed corners, quick changes of direction, slow chicanes, a lot of traction requires from the car, from the tyres," he explained.
"It is a big stress, therefore it is very important to look after tyres."