Valtteri Bottas has insisted a tyre blanket failure during opening practice for the inaugural Russian Grand Prix hasn't hurt him too much.

Bottas only completed 9 laps in FP1 at the Sochi Autodrom due to the issue, but managed 33 laps in the afternoon and ended the day fifth overall on a 1 minute 40.573 seconds - just 0.031 seconds off Nico Rosberg in P4 and 0.158 seconds up on Williams team-mate Felipe Massa in seventh.

"It is the first time it has happened, but I guess these things can happen," Bottas said, when asked about it.

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"It didn't hurt much as a whole day because I still got a good amount of laps in during practice two. We drove a bit more in FP2 because of the earlier problem and in the end I got nearly the same amount of laps for the whole day.

"We now need to investigate it a bit more and find out why it [the tyre blanket] went to a number it should never have been too."

Meanwhile, Bottas added that the track itself is pretty good.

"The track is a bit of a positive surprise for me," he continued. "It is quite technical and not that easy.

"The asphalt seems smooth, which means the tyres last really long. We didn't have much tyre drop off. Also it means getting the most out of the tyres on the first lap is really quite difficult. We have quite a bit of work to do still to get more out of the tyres sooner as it took a bit too long to get the tyres to work.

"Generally though, it is quite a good feeling to drive this track and it seems to be not bad for our car as well.

"Overall quite a good day."