0 1 . ▁At ▁ 2 0 ▁years ▁old , ▁Os aka ▁was ▁the ▁young est ▁winner ▁at ▁the ▁event ▁since ▁Ana ▁Ivan ov ic ▁in ▁ 2 0 0 8 , ▁and ▁at ▁any ▁Premier ▁Mand atory ▁event ▁since ▁Caroline ▁W oz nia cki ▁at ▁the ▁ 2 0 1 0 ▁China ▁Open . ▁She ▁was ▁also ▁only ▁the ▁third ▁un se eded ▁player ▁to ▁win ▁the ▁tournament ▁after ▁Ser ena ▁Williams ▁( 1 9 9 9 ) ▁and ▁C lij sters ▁( 2 0 0 5 ) ▁and ▁the ▁first ▁Japanese ▁player ▁to ▁win ▁a ▁Premier ▁Mand atory ▁title . ▁ ▁Sim ona ▁H ale p ▁and ▁W oz nia cki ▁were ▁in ▁cont ention ▁for ▁the ▁W TA ▁no . ▁ 1 ▁singles ▁ranking ▁at ▁the ▁beginning ▁of ▁the ▁tournament . ▁H ale p ▁retained ▁the ▁top ▁ranking ▁after ▁W oz nia cki ▁lost ▁in ▁the ▁fourth ▁round . ▁ ▁Moreover , ▁former ▁no . ▁ 1 ▁players ▁Victoria ▁Az aren ka , ▁Maria ▁Sh ar ap ova ▁and ▁Ser ena ▁Williams ▁played ▁in ▁the ▁same ▁tournament ▁for ▁the ▁first ▁time ▁since ▁the ▁ 2 0 1 6 ▁Australian ▁Open . ▁This ▁was ▁Az aren ka ' s ▁first ▁tournament ▁since ▁the ▁ 2 0 1 7 ▁W im ble don ▁Championships ▁and ▁Williams ' ▁first ▁since ▁the ▁ 2 0 1 7 ▁Australian ▁Open . ▁It ▁was ▁also ▁Sh ar ap ova ' s ▁first ▁appearance ▁at ▁Indian ▁Well s ▁since ▁ 2 0 1 5 . ▁ ▁Se