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SPA, BELGIUM - AUGUST 21: Nico Rosberg of Germany and Mercedes GP speaks with Paddy Lowe, Mercedes Technical Executive Director in the garage during practice for the Formula One Grand Prix of Belgium at Circuit de Spa-Francorchamps on August 21, 2015 in Spa, Belgium. (Photo by Lars Baron/Getty Images)

SPA, BELGIUM - AUGUST 21:  Nico Rosberg of Germany and Mercedes GP speaks with Paddy Lowe, Mercedes Technical Executive Director  in the garage during practice for the Formula One Grand Prix of Belgium at Circuit de Spa-Francorchamps on August 21, 2015 in Spa, Belgium.  (Photo by Lars Baron/Getty Images)