Formula One championship leader Nico Rosberg chalked up his seventh win in a row at the Russian Grand Prix on Sunday with teammate Lewis Hamilton fighting back from 10th on the grid to seal a Mercedes one-two finish.

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Hamilton was 25 seconds behind Rosberg with Ferrari’s Kimi Raikkonen finishing third after winning a battle with fellow-Finn Valtteri Bottas, who started on the front row, in the Williams.

Rosberg, who won the last three races of 2015 and now the first four of 2016, leads triple world champion Hamilton by 43 points in the standings with 17 races remaining.