Nico Rosberg rattled off his fourth straight win of the season at the Russian Grand Prix in Sochi on Sunday with his Mercedes teammate Lewis Hamilton taking second.

The race was marked by a chaotic first lap in which Ferrari's Sebastian Vettel retired after being hit twice by the Red Bull of Daniil Kyvat.

Kimi Raikkonen took third behind the Mercedes pair for Ferrari's 700th podium finish.
In the championship standings Rosberg stretched his lead over defending champion Hamilton to 43 points.