Nico Rosberg says he doesn't believe Mercedes is in for a slump akin to that of the Singapore Grand Prix after few conclusions could be drawn from the opening day of the Russian Grand Prix.

With delays and disruptions hampering FP1 after an oil spill and rain washing out FP2, little could be gleaned from the laps completed by the drivers and teams around the Sochi Autodrom.

With just the hour-long FP3 session left to set the car up for qualifying, some are suggesting Mercedes could find itself on the back foot with the super-soft/soft compounds, much like it did in Singapore when it was comprehensively out-paced by Ferrari and Red Bull on the same tyres.

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However, though Rosberg does not rule out a repeat entirely, he says he is hoping Mercedes is already 'close to perfection'

"I'm not nervous because I'm very confident that we have a great car," the title challenger said. "Of course, this could be a more difficult weekend here for us. Today, it's a pity really that it's been raining because that means we'll have to do all the work tomorrow morning.

"Hopefully we're starting off in the right place, because you need to guess when you travel to a new track, to guess how to set up the car. Hopefully we're close to perfection already, but we'll see."