Rosberg echoed Hamilton 's claim that the world champion 's were not chasing lap times in southern Spain .
Rosberg confirmed that pounding endlessly around the Jerez de la Frontera circuit would pay bigger dividends in the search for back - to - back titles .
Echoing Hamilton 's claim that the world champion 's were not chasing lap times in southern Spain , Rosberg confirmed that pounding endlessly around the Jerez de la Frontera circuit would pay bigger dividends in the search for back - to - back titles .