▁she ▁ups et ▁fourth ▁seed ▁El ina ▁Sv it ol ina ▁to ▁join ▁fellow ▁Americans ▁Co Co ▁V ande weg he , ▁Slo ane ▁Steph ens , ▁and ▁Ven us ▁Williams ▁in ▁the ▁quarter final s . ▁All ▁four ▁of ▁them ▁would ▁win ▁their ▁matches ▁to ▁set ▁up ▁an ▁all - American ▁semif inal . ▁This ▁was ▁the ▁first ▁time ▁four ▁Americans ▁made ▁the ▁semif inals ▁at ▁a ▁major ▁since ▁W im ble don ▁in ▁ 1 9 8 5 ▁and ▁the ▁first ▁occurrence ▁at ▁the ▁US ▁Open ▁since ▁ 1 9 7 9 . ▁In ▁the ▁semif inals , ▁Ke ys ▁defeated ▁V ande weg he ▁for ▁the ▁third ▁time ▁in ▁a ▁little ▁over ▁a ▁month , ▁losing ▁just ▁three ▁games . ▁Steph ens ▁won ▁the ▁other ▁semif inal . ▁These ▁vict ories ▁made ▁Ke ys ▁and ▁Steph ens ▁the ▁first ▁Americans ▁other ▁than ▁the ▁Williams ▁sister s ▁to ▁reach ▁a ▁women ' s ▁Grand ▁S lam ▁tournament ▁final ▁since ▁Ke ys ' s ▁coach ▁L inds ay ▁D aven port ▁in ▁ 2 0 0 5 . ▁B idd ing ▁to ▁become ▁the ▁first ▁American ▁US ▁Open ▁champion ▁other ▁than ▁the ▁Williams ▁sister s ▁since ▁D aven port ▁in ▁ 1 9 9 8 , ▁Ke ys ▁lost ▁in ▁the ▁final ▁to ▁her ▁close ▁friend ▁in ▁straight ▁sets . ▁▁ 2 0 1 8 : ▁French ▁and ▁US ▁Open ▁semif inals ▁ ▁Ke ys ▁entered ▁the ▁year ▁having ▁played ▁in ▁just ▁one ▁tournament ▁since ▁the ▁US ▁Open ▁final . ▁At ▁the