Rosberg beats Hamilton for Mercedes 1-2 finish at Austrian GP

Mercedes driver Nico Rosberg of Germany, and Mercedes driver Lewis Hamilton of Britain compete during the Austrian Formula One Grand Prix race at the Red Bull Ring in Spielberg, Austria, Sunday, June 22, 2014. (AP Photo/Darko Bandic) (The Associated Press)

Mercedes driver Nico Rosberg of Germany celebrates after he placed third in the qualifying for Sunday's Austrian Grand Prix at the Spielberg track, Austria, Saturday, June 21, 2014. . (AP Photo/Darko Vojinovic) (The Associated Press)

Nico Rosberg held off a challenge from teammate Lewis Hamilton to win the Austrian GP on Sunday for the sixth 1-2 finish by Mercedes this season.

It was Rosberg's third win of the year and sixth overall as he extended his lead in the drivers' championship over Hamilton.

Valtteri Bottas came third for his first career Formula One podium while Williams teammate Felipe Massa, who started from pole Position, took fourth.

Four-time Formula One champion Sebastian Vettel had an engine problem in the second lap and was doubled by the field before quitting the race in the 36th on Red Bull's home circuit.