▁ahead ▁of ▁Jar no ▁Tr ul li ' s ▁delayed ▁Lot us ▁in ▁the ▁closing ▁stages , ▁but ▁Sen na ▁retired ▁with ▁a ▁hyd ra ul ic ▁failure ▁on ▁lap ▁ 5 8 , ▁whilst ▁Tr ul li ' s ▁attempt ▁to ▁pass ▁Ch and h ok ▁eight ▁la ps ▁from ▁the ▁finish ▁resulted ▁in ▁the ▁two ▁cars ▁coll iding ▁and ▁ret iring ▁from ▁the ▁race , ▁although ▁Ch and h ok ▁was ▁class ified ▁in ▁ 1 4 th ▁position . ▁Both ▁drivers ▁also ▁hit ▁Rub ens ▁Bar rich ello ' s ▁ste ering ▁wheel , ▁which ▁the ▁Williams ▁driver ▁had ▁thrown ▁from ▁his ▁car ▁after ▁crash ing ▁earlier ▁in ▁the ▁race . ▁At ▁the ▁Turkish ▁Grand ▁Prix , ▁Sak on ▁Yam am oto ▁drove ▁the ▁car ▁for ▁the ▁first ▁time ▁in ▁the ▁first ▁practice ▁session ▁instead ▁of ▁Sen na . ▁Sen na ▁out qual ified ▁Di ▁Gr ass i ▁whilst ▁Ch and h ok ▁qualified ▁last , ▁but ▁both ▁cars ▁retired ▁with ▁mechanical ▁problems ▁in ▁the ▁race . ▁At ▁the ▁Canadian ▁Grand ▁Prix , ▁Ch and h ok ▁missed ▁the ▁third ▁free ▁practice ▁session ▁and ▁did ▁not ▁set ▁a ▁representative ▁time ▁in ▁qual ifying ▁due ▁to ▁hyd ra ul ic ▁and ▁sensor ▁problems , ▁but ▁Sen na ▁out qual ified ▁Di ▁Gr ass i ▁to ▁take ▁ 2 2 nd ▁place ▁on ▁the ▁grid . ▁In ▁the ▁race , ▁both ▁drivers ▁were ▁able ▁to ▁race ▁with ▁the ▁Virgin ▁cars ; ▁Ch and h ok ▁finished ▁in ▁ 1 8 th ▁position