Sebastian Vettel says Red Bull 's F1 dominance is down to hard work . The German driver has won the last three races in a row and leads his team by seven points over Ferrari with five rounds remaining. Vettel is unconcerned by the boos he consistently receives from fans . But we need a lot of luck ; we know that . Ferrari 's Ferando Alonso is refusing to give up on the 2013 title .
Sebastian Vettel says Red Bull 's F1 dominance is down to hard work . The German driver has won the last three races in a row and leads his team by seven points over Ferrari with five rounds remaining. Vettel is unconcerned by the boos he consistently receives from fans . Ferrari 's Ferando Alonso is refusing to give up on the 2013 title .