Nico Rosberg says he is 'not sure' whether Mercedes has maintained his advantage over Ferrari heading into the opening round of the 2016 Formula 1 World Championship, declaring the two teams as 'close'.
With eight days of testing wrapped up, the true form of Mercedes was never ultimately revealed after choosing not to fit anything quicker than a soft compound tyre, the team opting to focus primarily on notching up the mileage.
By contrast, Ferrari included fast efforts on the new ultra-soft and super-soft, with Kimi Raikkonen and Sebastian Vettel ending the test 1-2 on the timesheets.
Though the consensus remains that Mercedes still has an edge on Ferrari, the Italian team was showing eye-catching long run pace on the final day, raising suggestion it could yet prove comparable to its arch rivals. As such, Rosberg admits there is still some uncertainty in his mind as to whom has the advantage.
“Of course the most important is the speed which we're not 100 per cent sure of. We know that Ferrari is very close, so it can go either way really. So that's the most important but apart from that everything else has gone really, really well.
“Ferrari have been very quick, for sure, and all the teams have their strategists so we know what fuel all the others are running and they know our fuel so we know more or less where we are compared to Ferrari. That's why I say it's close, but we're not sure if we are ahead or behind. I just say let's wait two weeks.”