Nico Rosberg

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Mercedes driver Nico Rosberg of Germany steers his car during the second free practice ahead of the Bahrain Formula One Grand Prix at the Formula One Bahrain International Circuit in Sakhir, Bahrain, Friday, April 4, 2014. (AP Photo/Hassan Ammar)

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Mercedes driver Lewis Hamilton, left, of Britain and his teammate Nico Rosberg of Germany spray champagnes during the prize presentation on the podium after the Malaysian Formula One Grand Prix at Sepang International Circuit in Sepang, Malaysia, Sunday, March 30, 2014. Hamilton won the race while Rosberg finished in second. (AP Photo/Lai Seng Sin)

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Mercedes driver Lewis Hamilton, left, of Britain is congratulated by teammate and second placed Nico Rosberg of Germany after winning the Malaysian Formula One Grand Prix at Sepang International Circuit in Sepang, Malaysia, Sunday, March 30, 2014. (AP Photo/Vincent Thian)

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Mercedes driver Lewis Hamilton of Britain sprays champagne on the podium with teammate Nico Rosberg, right, after winning the the Malaysian Formula One Grand Prix at Sepang International Circuit in Sepang, Malaysia, Sunday, March 30, 2014. Rosberg finished in second place. (AP Photo/Vincent Thian)

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Mercedes driver Nico Rosberg of Germany arrives at the paddock before the Malaysian Formula One Grand Prix at Sepang International Circuit in Sepang, Malaysia, Sunday, March 30, 2014. (AP Photo/Lai Seng Sin)

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Red Bull Racing driver Sebastian Vettel, left, of Germany speaks as Mercedes drivers Lewis Hamilton, center, of Britain and Nico Rosberg, right, of Germany listen during a press conference after the qualifying session for Sunday's Malaysian Formula One Grand Prix at Sepang International Circuit in Sepang, Malaysia, Saturday, March 29, 2014. Hamilton took the pole position while Vettel with second position and Rosberg with third position. (AP Photo/Peter Lim)

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Mercedes driver Nico Rosberg of Germany smiles as he talks to crew members before the third practice session for the Malaysian Formula One Grand Prix at Sepang International Circuit in Sepang, Malaysia, Saturday, March 29, 2014. (AP Photo/Vincent Thian)