Many believe Ferrari's performance on the opening day of practice for the Brazilian Grand Prix put to rest suspicions about the Scuderia's engine power, but Red Bull's Helmut Marko still has his doubts. Two technical directives recently published by the FIA addressed, and outlawed, potential ploys that could be exploited to increase engine power. The TDs, the first of which was issued in Austin and was a response to a query from Red Bull, were rumored to be aimed at Ferrari, whose rivals have been scratching their head about the boost in straight-line speed and power of the Scuderia's cars since last summer. Coincidently - or not for some - the US Grand Prix saw a dip of form for the...
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