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Rosberg takes aims at Mercedes teammate Hamilton to break his run of 3 wins in a row

FILE - In this Saturday, June 29, 2013, file photo, Mercedes driver Lewis Hamilton of Great Britain, left, celebrates after winning the pole position, along with his teammate Nico Rosberg, right, of Germany who finished second following the qualifying session at the Silverstone circuit, England. Mercedes' rivals hope a busy three weeks of tinkering on their slower cars and the move to European tracks will be enough to at least threaten Lewis Hamilton's and Nico Rosberg's stranglehold on Formula One. (AP Photo/Lefteris Pitarakis)

FILE - In this Saturday, June 29, 2013, file photo, Mercedes driver Lewis Hamilton of Great Britain, left, celebrates after winning the pole position, along with his teammate Nico Rosberg, right, of Germany who finished second following the qualifying session at the Silverstone circuit, England. Mercedes' rivals hope a busy three weeks of tinkering on their slower cars and the move to European tracks will be enough to at least threaten Lewis Hamilton's and Nico Rosberg's stranglehold on Formula One. (AP Photo/Lefteris Pitarakis)  (The Associated Press)

While Lewis Hamilton keeps an eye on Red Bull, teammate Nico Rosberg will be taking aim at his Mercedes teammate at the Spanish Grand Prix.

Rosberg leads Hamilton in the standings by four points. They have dominated Formula One with four wins in as many races heading into Sunday's event.

But Hamilton has forced Rosberg to settle for second place en route to sweeping the last three races.

Rosberg says, "The result momentum is on his side and I need to turn that around. I am here to win in Barcelona, and try and extend the lead in the championship."

Hamilton says, "Red Bull is in the back of my mind," while adding that Ferrari's Fernando Alonso has "shown pace" with his third-place finish at the last race in China.