Nico Rosberg secured his third career pole position as Mercedes completed a hat-trick of qualifying successes - and then warned that he is worried his tyres will let him down in Sunday's Spanish Grand Prix.
Mercedes' German driver Nico Rosberg during the third practice session at the Circuit de Catalunya in Montmelo near Barcelona on May 11, 2013. Rosberg grabbed pole position as his Mercedes team completed a hat-trick of qualifying successes by sweeping the front row Saturday for Sunday's Spanish Grand Prix.
The 27-year-old German led the way as his team locked out the front row of Saturday's grid but he was immediately concerned afterwards that he does not endure a repeat of his problems at last month's Bahrain Grand Prix where he limped home ninth.
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