Red Bull/Getty Images Sebastian Vettel believes there is still performance to be extracted from the Red Bull RB10 ahead of this weekend's Canadian Grand Prix. Vettel suffered a gearbox issue during the second 90 minute practice session but returned to the circuit to set the third quickest lap time at the track where he emerged victorious in 2013. "It was a bit of a shame to lose some laps; we had something with the gearbox, but fortunately we got it checked and went out again," said the reigning world champion. "It meant that we were maybe a bit off the rhythm compared to some of the others, but it seemed to be alright and we still got some good laps completed. I think...
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