Original: With the ` one set of tyres per race ' rule no longer in use , Ferrari , after a poor 2005 and a troubled start to 2006 , were again close contenders for both Drivers ' and Constructors ' titles by the latter part of the 2006 season .
Simplified: Ferrari and Räikkönen are the reigning Constructors ' and Drivers ' title holders respectively , after the conclusion of the 2007 season .