▁pack , ▁Michael ▁Sch um acher ▁was ▁in ▁control , ▁extending ▁his ▁lead ▁over ▁Bar rich ello ▁to ▁five ▁seconds ▁by ▁lap ▁ten . ▁Button ▁took ▁t enth ▁position ▁from ▁Ir v ine ▁on ▁lap ▁twelve , ▁while ▁He id feld ▁coll ided ▁with ▁A les i , ▁sending ▁his ▁team mate ▁into ▁a ▁spin ▁who ▁rejo ined ▁in ▁ 1 8 th . ▁Button ▁moved ▁into ▁nin th ▁place ▁when ▁he ▁passed ▁Sal o ▁on ▁lap ▁ 1 3 . ▁Z ont a , ▁who ▁was ▁running ▁ 1 7 th , ▁suffered ▁bra ke ▁problems ▁on ▁lap ▁ 1 7 ▁and ▁coll ided ▁with ▁the ▁ty re ▁bar riers ▁which ▁caused ▁him ▁to ▁ret ire ▁from ▁the ▁Grand ▁Prix . ▁ ▁By ▁the ▁ 1 8 th ▁lap , ▁Michael ▁Sch um acher ▁had ▁extended ▁his ▁lead ▁over ▁Bar rich ello ▁by ▁ 6 . 2 ▁seconds , ▁who ▁in ▁turn ▁was ▁continu ing ▁to ▁hold ▁up ▁C oul th ard ▁in ▁third . ▁Hä kk inen ▁was ▁a ▁further ▁ 1 . 4 ▁seconds ▁behind ▁his ▁team mate ▁but ▁was ▁drawing ▁ahead ▁of ▁Vill ene uve ▁in ▁fifth . ▁Herbert ▁made ▁an ▁un sch eduled ▁pit ▁stop ▁due ▁to ▁a ▁g ear box ▁issue ▁and ▁retired ▁two ▁la ps ▁later . ▁Meanwhile , ▁on ▁the ▁same ▁lap , ▁A les i ▁became ▁the ▁first ▁driver ▁to ▁pit ▁for ▁ty res ▁on ▁the ▁same ▁lap . ▁Tr ul li ▁became ▁the ▁first ▁front ▁runner ▁to ▁pit ▁on ▁lap ▁ 2 1