▁opt ing ▁to ▁play ▁in ▁eight ▁I TF ▁Pro ▁Circ uit ▁events ▁over ▁the ▁same ▁period . ▁Her ▁best ▁result ▁that ▁year ▁was ▁winning ▁both ▁the ▁singles ▁and ▁doubles ▁titles ▁at ▁the ▁Gra de ▁B 1 ▁Pan ▁American ▁Cl osed ▁I TF ▁Championships , ▁which ▁is ▁the ▁highest ▁level ▁of ▁regional ▁tournament ▁on ▁the ▁junior ▁tour . ▁After ▁the ▁ 2 0 1 1 ▁US ▁Open , ▁Ke ys ▁moved ▁to ▁the ▁pro ▁tour ▁full - time . ▁She ▁was ▁ranked ▁No . ▁ 1 6 ▁in ▁the ▁I TF ▁junior ▁rank ings ▁at ▁the ▁time , ▁a ▁personal ▁best . ▁At ▁this ▁stage ▁of ▁her ▁career , ▁she ▁was ▁already ▁ 5 ' ▁ 1 0 ", ▁serving ▁at ▁, ▁and ▁could ▁hit ▁strong ▁fore hand ▁and ▁back hand ▁w inners . ▁ ▁Professional ▁career ▁▁ 2 0 0 9 – 1 2 : ▁W TA ▁match ▁win ▁at ▁age ▁ 1 4 ▁ ▁Ke ys ▁turned ▁pro ▁in ▁February ▁ 2 0 0 9 ▁on ▁her ▁ 1 4 th ▁birth day . ▁She ▁made ▁her ▁W TA ▁debut ▁a ▁few ▁months ▁later ▁at ▁the ▁P onte ▁V ed ra ▁Beach ▁Championships , ▁having ▁only ▁played ▁in ▁one ▁previous ▁professional ▁tournament ▁where ▁she ▁lost ▁her ▁only ▁match . ▁In ▁her ▁debut , ▁she ▁defeated ▁world ▁No . ▁ 8 1 ▁Al la ▁K ud ry av t se va ▁in ▁straight ▁sets . ▁At ▁the ▁age ▁of ▁ 1 4 ▁years ▁and ▁ 4 8 ▁days , ▁she ▁became ▁the ▁