Lewis Hamilton dominated the Russian Grand Prix to take his ninth win of the year, his fourth in a row and extend his championship lead.
Hamilton's team-mate Nico Rosberg fought back following a first-lap error to take second, sealing the constructors' title for Mercedes.
Rosberg trails Hamilton by 17 points with three races remaining and a maximum of 100 points available.
Williams's Valtteri Bottas was third ahead of McLaren's Jenson Button.
The Englishman had been in a battle with Ferrari's Fernando Alonso, but the Spaniard dropped back behind the second McLaren of Kevin Magnussen with a slow pit stop.
Alonso fended off a challenge from Red Bull's Daniel Ricciardo in the later stages of the race to take sixth.
The race was overshadowed by the sport's concern for Marussia driver Jules Bianchi, who is in critical condition after a crash in the Japanese Grand Prix last weekend.
There was a tribute to the Frenchman on the grid from both the Marussia team and the other drivers.
Marussia decided to run only one car in the race, leaving Bianchi's fully prepared but on stands in the garage in tribute to the Frenchman.
More to follow.
Lewis Hamilton acknowledges the Russian crowd on the top step of the podium