May 8 (GMM) Bruno Senna has played down suggestions he was blown away by Christian Klien in Barcelona on Friday.

The pair shared the Circuit de Catalunya in morning practice, when the experienced Austrian Klien took over the cockpit usually driven by Senna's fellow rookie teammate Karun Chandhok.

At the end of the session, Klien's best lap was five tenths faster than Senna's.

"There were two reasons," Brazilian Senna told Germany's Motorsport-Magazin.com.

"First, he had the fast-shift transmission in his car, which is worth about two and a half tenths per lap, and secondly I had a problem with my engine cover," he insisted.

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