ys ▁re kind led ▁her ▁relationship ▁with ▁D aven port ▁and ▁brought ▁her ▁back ▁as ▁her ▁primary ▁coach . ▁ ▁Due ▁to ▁surg ery , ▁Ke ys ▁missed ▁the ▁Australian ▁Open ▁and ▁did ▁not ▁return ▁to ▁the ▁tennis ▁scene ▁until ▁March ▁at ▁the ▁Indian ▁Well s ▁Open . ▁Although ▁she ▁would ▁make ▁it ▁to ▁the ▁third ▁round ▁at ▁the ▁tournament , ▁Ke ys ▁would ▁begin ▁a ▁long ▁period ▁of ▁strugg les ▁that ▁last ed ▁deep ▁into ▁the ▁summer . ▁During ▁this ▁period , ▁she ▁also ▁had ▁a ▁second ▁surg ery ▁on ▁her ▁w rist ▁after ▁the ▁French ▁Open . ▁Ke ys ▁did ▁not ▁win ▁back - to - back ▁matches ▁again ▁until ▁the ▁Stan ford ▁Classic ▁in ▁August . ▁By ▁this ▁point , ▁her ▁ranking ▁had ▁fallen ▁out ▁of ▁the ▁Top ▁ 2 0 . ▁Despite ▁entering ▁the ▁Premier - level ▁tournament ▁with ▁only ▁six ▁wins ▁on ▁the ▁season , ▁Ke ys ▁won ▁the ▁event ▁after ▁knock ing ▁out ▁W im ble don ▁champion ▁Gar bi ñ e ▁M ug uru za ▁in ▁the ▁semif inals ▁and ▁close ▁friend ▁Co Co ▁V ande weg he ▁in ▁the ▁final ▁in ▁their ▁first ▁ever ▁meeting . ▁This ▁was ▁her ▁third ▁career ▁title . ▁Ke ys ▁then ▁defeated ▁V ande weg he ▁in ▁her ▁very ▁next ▁match ▁at ▁the ▁C inc inn ati ▁Open , ▁but ▁this ▁time ▁she ▁was ▁stopped ▁by ▁M ug uru za ▁in ▁the ▁third ▁round . ▁ ▁Ke ys ▁next ▁played ▁at ▁the ▁US ▁Open . ▁In ▁the ▁fourth ▁round ,