Lewis Hamilton says he is satisfied with the performance of his Mercedes ahead of the Russian Grand Prix as he topped FP2 despite several spins over the course of the day.

The defending champion initially trailed team-mate Nico Rosberg in the first session of the weekend around the Sochi Autodrom by eight tenths, suffering several off-track moments and a spin as he - along with other drivers - struggled to find grip in the chilly conditions.

Suffering another turn around in FP2, Hamilton was nonetheless up to speed on his supersoft tyre lap, stopping the clock at 1min 37.583secs, putting him seven tenths clear of the Sebastian Vettel and nine tenths up on the traffic-hampered Rosberg.

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Though he put the offs down to simply pushing on and finding the limits of the circuit, Hamilton admits it was difficult to find the grip at times.

"Jeez it's so hard out there with this track as well. The tyres are not very grippy so sliding around a lot but it's looking OK so far. I'm pushing like crazy, hence why you've seen a couple of spins.

"I mean it's never 100 per cent but it feels like you hit the sweet spot but just very rarely. Like one lap is OK, it's nearly there and then the next lap it's off. It's very, very tricky, it's a very fine line between being on the perfect line and not. I think it's the tyres magnified here as there is not very much grip, it's like driving on ice out there it's crazy."

Despite this, Hamilton was largely pleased with the performance of the W07 and is satisfied with the direction of team is going in.

"Generally good. The first one [session] I didn't really get a lap and in this one I did so even with the spins I was still quickest, so I'm happy with the set up changes and the direction we are going but it's tricky out there."