Mercedes' Nico Rosberg coasted to his first home German Grand Prix win at Hockenheim on Sunday to extend his lead over team-mate Lewis Hamilton in the drivers championship.

Williams driver Valtteri Bottas took second, with Hamilton in third after muscling his way up through the pack from 20th on the grid.

Rosberg's fourth win of the season, cheered on by Germany World Cup winner Lukas Podolski in the Mercedes garage, lifted him on to 190 points, with Hamilton 14 points adrift.

There was drama at the start when the Williams of Felipe Massa, starting from the second row, somersaulted spectacularly.

The Brazilian's car came to rest in the safety gravel and he walked away unscathed after the accident triggered when Kevin Magnussen's McLaren clipped the rear of his car.

For Rosberg the result capped a memorable week in which he watched his country's footballers win the World Cup, married his longtime girlfriend and signed a new deal with Mercedes.