ys ▁won ▁the ▁final ▁at ▁the ▁Stan ford ▁Classic ▁in ▁straight ▁sets ▁to ▁claim ▁her ▁third ▁career ▁title . ▁They ▁were ▁then ▁drawn ▁against ▁each ▁other ▁in ▁the ▁first ▁round ▁of ▁the ▁C inc inn ati ▁Open , ▁the ▁very ▁next ▁match ▁for ▁both ▁players . ▁Ke ys ▁won ▁again , ▁this ▁time ▁in ▁three ▁sets . ▁They ▁next ▁met ▁in ▁the ▁semif inals ▁of ▁the ▁US ▁Open ▁where ▁they ▁were ▁both ▁trying ▁to ▁reach ▁their ▁first ▁career ▁Grand ▁S lam ▁singles ▁final . ▁Ke ys ▁easily ▁defeated ▁V ande weg he ▁in ▁straight ▁sets , ▁only ▁losing ▁three ▁games . ▁ ▁Ke ys ▁vs . ▁Ker ber ▁and ▁H ale p ▁Out ▁of ▁all ▁the ▁players ▁who ▁have ▁been ▁ranked ▁world ▁No . ▁ 1 , ▁Ke ys ▁has ▁most ▁frequently ▁faced ▁off ▁against ▁Angel ique ▁Ker ber ▁and ▁Sim ona ▁H ale p . ▁Both ▁Ker ber ▁and ▁H ale p ▁have ▁been ▁effective ▁at ▁using ▁their ▁counter - p unch ing ▁style ▁to ▁neutral ize ▁Ke ys ' s ▁power . ▁As ▁a ▁result , ▁she ▁does ▁not ▁have ▁a ▁good ▁record ▁against ▁either ▁of ▁them , ▁going ▁ 2 – 8 ▁against ▁Ker ber ▁and ▁ 2 – 5 ▁against ▁H ale p . ▁Many ▁of ▁these ▁enc oun ters ▁have ▁taken ▁place ▁in ▁important ▁tournament s . ▁Both ▁Ker ber ▁and ▁H ale p ▁defeated ▁Ke ys ▁in ▁the ▁round ▁ro bin ▁stage ▁of ▁the ▁ 2 0 1 6 ▁W TA ▁Final s ▁to ▁prevent ▁her ▁from