Pirelli boss Paul Hembery believes Mercedes are still struggling with high tyre degradation levels, following Nico Rosberg's three-stop strategy at the 2013 F1 Canadian Grand Prix on Sunday.Rosberg was the only one of the front runners who stopped three times in Montreal, after choosing not to switch to the medium compound following his first stint on the super softs. Mercedes posted third and fifth place finishes on Sunday, with Lewis Hamilton taking his third podium of the season. But Hembery believes that a three-stop strategy showed Mercedes vulnerability with regard to tyres: “Mercedes still seem to be suffering from high levels of degradation,” he said.“Nico Rosberg was the...
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