▁the ▁third ▁round . ▁In ▁the ▁quarter final s , ▁Ke ys ▁got ▁a ▁second ▁opportunity ▁to ▁face ▁off ▁against ▁Ven us ▁Williams , ▁who ▁was ▁ranked ▁No . ▁ 1 8 ▁in ▁the ▁world . ▁She ▁defeated ▁Ven us ▁for ▁the ▁first ▁time ▁in ▁a ▁tight ▁three ▁set ▁match , ▁despite ▁inj uring ▁her ▁left ▁th igh ▁in ▁the ▁middle ▁of ▁the ▁second ▁set . ▁This ▁set ▁up ▁a ▁cl ash ▁with ▁world ▁No . ▁ 1 ▁Ser ena ▁Williams ▁in ▁the ▁semif inals . ▁After ▁a ▁very ▁tight ▁first ▁set , ▁Ke ys ▁ultimately ▁lost ▁in ▁straight ▁sets . ▁After ▁the ▁match , ▁Ser ena , ▁who ▁eventually ▁went ▁on ▁to ▁capture ▁the ▁title , ▁spoke ▁of ▁a ▁bright ▁future ▁for ▁Ke ys , ▁saying , ▁" It ▁was ▁an ▁honor ▁for ▁me ▁to ▁play ▁someone ▁who ▁will ▁be ▁No . ▁ 1 ▁in ▁the ▁future ." ▁With ▁her ▁first ▁major ▁semif inal , ▁Ke ys ▁clim bed ▁into ▁the ▁top ▁ 2 0 ▁for ▁the ▁first ▁time . ▁ ▁Ke ys ▁was ▁unable ▁to ▁carry ▁her ▁momentum ▁through ▁the ▁early - year ▁hard - court ▁season . ▁Non eth eless , ▁she ▁continued ▁to ▁impress ▁once ▁the ▁cl ay ▁court ▁season ▁came ▁around . ▁She ▁reached ▁the ▁final ▁at ▁the ▁Char l eston ▁Open , ▁losing ▁to ▁Angel ique ▁Ker ber ▁after ▁conced ing ▁a ▁ 4 – 1 ▁lead ▁in ▁the ▁third ▁set . ▁As ▁the ▁ 1 6 th ▁seed ▁at ▁the ▁French ▁Open , ▁Ke ys ▁made