Mercedes Formula One driver Nico Rosberg of Germany celebrates with the trophy after winning the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh TPX IMAGES OF THE DAY

Mercedes Formula One driver Nico Rosberg of Germany celebrates winning with team members and technicians after the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh 

Mercedes Formula One driver Nico Rosberg of Germany celebrates winning with team members and technicians after the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh

Mercedes Formula One driver Nico Rosberg celebrates after taking the chequered flag to win the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Valdrin Xhemaj/Pool

Ferrari Formula One driver Sebastian Vettel of Germany looks into his car after the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Valdrin Xhemaj/Pool

Mercedes Formula One driver Nico Rosberg of Germany celebrates next to his second placed team mate Lewis Hamilton of Britain (L) third placed Williams driver Felipe Massa of Brazil (R) and Engineering Director of Mercedes Hywel Thomas (2nd L) after winning the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh

Mercedes Formula One drivers Lewis Hamilton of Britain (front) and Nico Rosberg of Germany celebrate their first and second places with the team after the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh

Williams Formula One driver Felipe Massa of Brazil kisses the trophy to celebrate his third place on the podium following the Austrian F1 Grand Prix in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh

Winning Mercedes Formula One driver Nico Rosberg of Germany is showered by his team mate and 2nd placed Lewis Hamilton of Britain as third placed Williams F1 driver Felipe Massa of Brazil looks on during the podium ceremony of the Austrian F1 Grand Prix in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh TPX IMAGES OF THE DAY 

Mercedes Formula One driver Nico Rosberg of Germany dives into his technicians as he celebrates winning the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Leonhard Foeger 

Williams Formula One driver Valtteri Bottas of Finland makes a pit stop during the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh 

Ferrari Formula One driver Sebastian Vettel of Germany leaves the pits after a tyre change during the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh 

Mercedes Formula One driver Nico Rosberg of Germany leads the pack during the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh 

Mercedes Formula One driver Nico Rosberg of Germany (L) leads the pack after overtaking his team mate Lewis Hamilton of Britain (C) at the start of the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh 

Former three-times Formula One World Champion Niki Lauda of Austria drives in the winning McLaren MP4/2 of his times before the start of the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 21, 2015. REUTERS/Laszlo Balogh 

Mercedes Formula One driver Lewis Hamilton of Britain steers his car to take the pole position in the qualifying session for the Austrian F1 Grand Prix in Spielberg, Austria, June 20, 2015. oREUTERS/Laszlo Balogh

Mercedes Formula One driver Lewis Hamilton is flanked by Ferrari driver Vettel of Germany and team mate Nico Rosberg of Germany (L) after taking the pole postion in the qualifying session for the Austrian F1 Grand Prix in Spielberg, Austria, June 20, 2015. REUTERS/Laszlo Balogh

Mercedes Formula One driver Nico Rosberg of Germany reacts as team mate Lewis Hamilton (L) of Britain looks on following the qualifying session for the Austrian F1 Grand Prix in Spielberg, Austria, June 20, 2015. REUTERS/Laszlo Balogh TPX IMAGES OF THE DAY

Mercedes Formula One driver Lewis Hamilton is flanked by Ferrari driver Vettel of Germany and team mate Nico Rosberg of Germany (L) following the qualifying session for the Austrian F1 Grand Prix in Spielberg, Austria, June 20, 2015. REUTERS/Laszlo Balogh TPX IMAGES OF THE DAY

The Mercedes Formula One car of Germany's Nico Rosberg of Germany is towed following the qualifying session for the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 20, 2015. REUTERS/Leonhard Foeger 

Mercedes Formula One driver Nico Rosberg of Germany stands behind his car after landing in the gravel during the qualifying session for the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 20, 2015. REUTERS/Leonhard Foeger TPX IMAGES OF THE DAY

Mercedes Formula One driver Nico Rosberg of Germany gets out of his car after landing in the gravel during the qualifying session for the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 20, 2015. REUTERS/Leonhard Foeger 

Ferrari Formula One driver Sebastian Vettel of Germany drives his car during the third practice session of the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 20, 2015. REUTERS/Leonhard Foeger 

Ferrari Formula One driver Sebastian Vettel of Germany is reflected in a window as he drives his car during the second practice session of the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 19, 2015. REUTERS/Leonhard Foeger 

Red Bull Formula One driver Daniel Ricciardo of Australia drives during the second practice session of the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 19, 2015. REUTERS/Laszlo Balogh

Mercedes Formula One driver Lewis Hamilton of Britain arrives in the pit during the second practice session of the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 19, 2015. REUTERS/Leonhard Foeger 

McLaren Formula One driver Jenson Button of Britain sits in his car in the pit during the first practice session of the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 19, 2015. REUTERS/Leonhard Foeger 

Lotus Formula One driver Pastor Maldonado of Venezuela drives in front of his team mate Romain Grosjean of France during the first practice session of the Austrian F1 Grand Prix at the Red Bull Ring circuit in Spielberg, Austria, June 19, 2015. REUTERS/Laszlo Balogh