pe ▁Mass a ▁announced ▁his ▁ret irement ▁from ▁the ▁sport ▁for ▁the ▁second ▁time , ▁Kub ica ▁became ▁one ▁of ▁the ▁top ▁cont enders ▁to ▁take ▁his ▁seat ▁at ▁Williams ▁Mart ini ▁Racing . ▁He ▁then ▁tested ▁for ▁them ▁at ▁the ▁Y as ▁Marina ▁Circ uit ▁following ▁the ▁ 2 0 1 7 ▁Ab u ▁D hab i ▁Grand ▁Prix , ▁comple ting ▁ 1 0 0 ▁la ps ▁in ▁his ▁first ▁test ▁with ▁the ▁team ' s ▁ 2 0 1 7 ▁F W 4 0 . ▁He ▁completed ▁an ▁additional ▁ 2 8 ▁la ps ▁the ▁next ▁day ▁and ▁finished ▁sevent h ▁fast est , ▁with ▁Williams ▁technical ▁chief ▁P addy ▁L owe ▁reporting ▁that ▁" there ▁are ▁no ▁issues ▁around " ▁his ▁inj uries , ▁though ▁doub ts ▁soon ▁emer ged ▁about ▁whether ▁certain ▁factors ▁had ▁made ▁the ▁times ▁look ▁better . ▁ ▁Williams ▁▁ 2 0 1 8 ▁season : ▁reserve ▁driver ▁for ▁Williams ▁ ▁On ▁ 1 6 ▁January ▁ 2 0 1 8 , ▁it ▁was ▁announced ▁that ▁Kub ica ▁would ▁become ▁the ▁reserve ▁driver ▁of ▁Williams ▁for ▁the ▁ 2 0 1 8 ▁season . ▁He ▁took ▁part ▁in ▁his ▁first ▁Grand ▁Prix ▁week end ▁since ▁the ▁final ▁round ▁of ▁the ▁ 2 0 1 0 ▁campaign , ▁in ▁Friday ' s ▁first ▁practice ▁session ▁at ▁the ▁ 2 0 1 8 ▁Spanish ▁Grand ▁Prix , ▁out perform ing ▁team mate ▁L ance ▁St roll . ▁▁ 2 0 1 9 ▁season : ▁full - time