▁at ▁semif inals ▁of ▁premier ▁ 5 ▁tournament ▁at ▁ 2 0 1 6 ▁Italian ▁Open , ▁and ▁also ▁another ▁semif inals ▁at ▁ 2 0 1 7 ▁Bank ▁of ▁the ▁West ▁Classic , ▁which ▁was ▁their ▁fast est ▁match ▁so ▁far , ▁as ▁Ke ys ▁lost ▁only ▁five ▁games . ▁The ▁latter ▁was ▁a ▁significant ▁win ▁for ▁Ke ys ▁as ▁M ug uru za ▁was ▁playing ▁her ▁first ▁tournament ▁since ▁winning ▁W im ble don . ▁M ug uru za ▁won ▁the ▁next ▁match ▁at ▁ 2 0 1 7 ▁C inc inn ati ▁Open ▁only ▁two ▁weeks ▁later , ▁after ▁Ke ys ▁served ▁for ▁the ▁match ▁and ▁missed ▁two ▁match ▁points . ▁Two ▁years ▁later ▁at ▁the ▁same ▁tournament , ▁Ke ys ▁won ▁after ▁a ▁big ▁three - set ▁battle ▁and ▁went ▁on ▁to ▁win ▁the ▁title . ▁▁ ▁First ▁match ▁against ▁Os aka ▁at ▁the ▁ 2 0 1 6 ▁US ▁Open ▁came ▁when ▁Os aka ▁was ▁still ▁a ▁te en ager , ▁while ▁two - year s - older ▁Ke ys ▁was ▁more ▁experienced ▁having ▁already ▁reached ▁Major ▁semif inals ▁and ▁top ▁ 1 0 . ▁In ▁the ▁end , ▁experience ▁turned ▁out ▁to ▁be ▁a ▁key ▁for ▁the ▁win , ▁as ▁Mad ison ▁found ▁herself ▁down ▁ 1 – 5 ▁in ▁third ▁set , ▁but ▁won ▁the ▁next ▁five ▁games ▁and ▁eventually ▁won ▁the ▁tie - break ▁to ▁progress ▁to ▁the ▁fourth ▁round . ▁Ke ys ▁went ▁on ▁to ▁win ▁much ▁easier ▁in ▁stra igh ▁sets ▁their ▁next