aking ▁her ▁debut ▁at ▁the ▁event , ▁Ke ys ▁defeated ▁Domin ika ▁C ib ulk ova ▁but ▁lost ▁her ▁other ▁two ▁matches . ▁She ▁did ▁not ▁advance ▁out ▁of ▁the ▁round - ro bin ▁stage , ▁with ▁C ib ulk ova ▁instead ▁making ▁it ▁to ▁the ▁final ▁r ounds ▁through ▁the ▁tie break ▁criteria ▁and ▁ultimately ▁winning ▁the ▁event . ▁Ke ys ▁finished ▁the ▁year ▁ranked ▁No . ▁ 8 ▁in ▁the ▁world , ▁becoming ▁the ▁first ▁American ▁other ▁than ▁the ▁Williams ▁sister s ▁to ▁finish ▁a ▁year ▁with ▁a ▁top ▁ 1 0 ▁ranking ▁since ▁L inds ay ▁D aven port ▁in ▁ 2 0 0 5 . ▁Despite ▁her ▁successful ▁year , ▁Ke ys ▁ended ▁her ▁partners hip ▁with ▁coach ▁H ög sted t ▁in ▁November . ▁▁ 2 0 1 7 : ▁In j ury ▁strugg les , ▁US ▁Open ▁runner - up ▁ ▁Before ▁the ▁beginning ▁of ▁the ▁season , ▁Ke ys ▁had ▁surg ery ▁to ▁repair ▁her ▁injured ▁left ▁w rist , ▁which ▁she ▁hurt ▁over ▁a ▁year ▁earlier ▁at ▁the ▁ 2 0 1 5 ▁US ▁Open . ▁She ▁was ▁aware ▁of ▁the ▁injury ▁in ▁the ▁middle ▁of ▁ 2 0 1 6 ▁and ▁was ▁planning ▁on ▁having ▁surg ery ▁after ▁the ▁ 2 0 1 6 ▁US ▁Open . ▁However , ▁she ▁decided ▁to ▁delay ▁surg ery ▁in ▁order ▁to ▁attempt ▁to ▁qual ify ▁for ▁the ▁year - end ▁W TA ▁Final s ▁for ▁the ▁first ▁time . ▁Also ▁during ▁the ▁off - season , ▁Ke