Lewis Hamilton benefitted from team orders at Mercedes-GP to win the Russian Grand Prix and extend his lead in the Formula One drivers' championship to 50 points with five races remaining.
Valtteri Bottas was ordered by the German marque to slow and allow the Briton to pass him mid-race, and the Finn obeyed the request.
Bottas had led the first stint of the race until his pit stop, but with Hamilton struggling with a blister on one of his tyres, the decision was made to swop positions to ensure they took the one-two finish and Hamilton boosted his hopes of a fifth world title, and a fourth in five years.
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Hamilton's title rival Sebastian Vettel had to settle for third place. He had briefly got ahead of Hamilton during the pit stops, but the Briton passed him to regain the position.
Kimi Raikkonen was a fourth in the second Ferrari, with Max Verstappen, who led much of the race as he drove a long first stint on the soft Pirelli tyres, coming through to take fifth after he had started 19th due to grid penalties for engine changes.
Daniel Ricciardo was a distant sixth in the second Red Bull.
The next race is in Japan on October 7.