Nico Rosberg will revert to a more conventional set-up for the rest of the inaugural Russian Grand Prix weekend.

Rosberg topped the times in opening practice at the Sochi Autodrom, just pipping Mercedes team-mate, Lewis Hamilton. However he was only fourth on the timesheets in the afternoon, 0.912 seconds slower, after making a mistake on his quick lap in FP2.

Speaking after the session, he revealed that he had gone with something "creative", but didn't feel it had worked.

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"The whole track was very unique today. Not only the layout, but the way the tyres worked and everything - very unusual," he stated.

"That makes it very interesting from an engineering perspective because it is unlike any other track we have seen this year. We even went as far as trying something completely creative on my car - something that we have not done so far, but it didn't work out and we need to go back on that tomorrow."

"But other than that it was okay," he continued.

"It is a good track and a difficult track to get right. It seems that there is no tyre degradation here and we need that for overtaking.

"I think it is going to be quite difficult to overtake [in the race]. We might maybe even one stop because there is no degradation - the tyres are just the same all the time. Definitely it is all a bit unusual here. We [will] need to be a bit creative.

"It is going to be a challenging weekend."