dimensional , ▁which ▁is ▁pretty ▁rare ▁in ▁this ▁day ▁and ▁age ." ▁ ▁Junior ▁career ▁When ▁Ke ys ▁was ▁ 1 2 ▁years ▁old , ▁she ▁went ▁ 2 3 – 2 ▁in ▁her ▁girls ▁ 1 2 s ▁matches , ▁including ▁a ▁perfect ▁ 1 9 – 0 ▁in ▁ 2 0 0 7 . ▁Her ▁most ▁notable ▁title ▁was ▁a ▁victory ▁at ▁the ▁ 1 2 - and - under ▁Junior ▁Orange ▁Bowl . ▁At ▁the ▁age ▁of ▁ 1 3 , ▁Ke ys ▁began ▁compet ing ▁in ▁ 1 8 - and - under ▁I TF ▁events . ▁In ▁January ▁ 2 0 0 9 , ▁she ▁won ▁the ▁Copa ▁del ▁C afé , ▁a ▁high - level ▁Gra de ▁ 1 ▁tournament ▁in ▁Costa ▁Rica , ▁to ▁become ▁the ▁first ▁American ▁winner ▁of ▁the ▁girls ' ▁event ▁in ▁its ▁ 2 6 - year ▁history . ▁Later ▁that ▁year , ▁her ▁coach ▁John ▁E vert ▁remarked ▁that , ▁" She ' s ▁got ▁weapons ▁at ▁a ▁very ▁young ▁age . ▁Most ▁of ▁the ▁top ▁players ▁in ▁the ▁world ▁have ▁weapons , ▁but ▁it ▁takes ▁some ▁time ▁to ▁develop ▁them . ▁Mad ison ▁at ▁the ▁age ▁of ▁ 1 4 ▁can ▁hit ▁her ▁serve ▁or ▁her ▁fore hand ▁as ▁big ▁as ▁most ▁of ▁the ▁girls , ▁and ▁some ▁of ▁the ▁top ▁girls , ▁on ▁the ▁pro ▁tour ." ▁ ▁As ▁a ▁ 1 5 - year ▁old , ▁Ke ys ▁played ▁in ▁just ▁five ▁I TF ▁Junior ▁events , ▁instead