Heavy tyre degradation caused by the searing Sepang temperatures has limited Mercedes' advantage over their Formula One rivals at the Malaysian Grand Prix, according to championship leader Nico Rosberg. Rosberg was still quickest in practice but only 0.2 seconds separated the top six at the Sepang circuit on Friday where track temperatures peaked at over 50 Celsius causing havoc to the tyres and leading to a number of uncharacteristic spins. Hamilton, who was quickest in the opening session, spun in both 90 minute runs and compared the circuit to "driving on marbles", while the normally unflappable Fernando Alonso also had trouble controlling his Ferrari. Rosberg said the team...
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