0 ▁October ▁ 1 9 7 9 ) ▁is ▁a ▁former ▁professional ▁tennis ▁player ▁from ▁the ▁Czech ▁Republic . ▁ ▁Tennis ▁career ▁ ▁Juni ors ▁K ral ert ▁had ▁a ▁good ▁year ▁as ▁a ▁junior ▁in ▁ 1 9 9 6 , ▁when ▁he ▁won ▁the ▁Ban ana ▁Bowl ; ▁was ▁a ▁doubles ▁champion ▁at ▁the ▁Orange ▁Bowl , ▁partner ing ▁coun tr yman ▁Robin ▁Vik ; ▁and ▁bag elled ▁Roger ▁Feder er ▁when ▁he ▁beat ▁the ▁future ▁World ▁No . ▁ 1 ▁in ▁the ▁Sun sh ine ▁Cup . ▁He ▁reached ▁as ▁high ▁as ▁No . ▁ 1 9 ▁in ▁the ▁junior ▁world ▁singles ▁rank ings ▁( and ▁No . ▁ 1 6 ▁in ▁doubles ). ▁ ▁Pro ▁tour ▁In ▁ 1 9 9 9 ▁he ▁made ▁an ▁appearance ▁for ▁the ▁Czech ▁Republic ▁Davis ▁Cup ▁team , ▁in ▁a ▁World ▁Group ▁play - off ▁tie ▁against ▁U z bek istan . ▁He ▁defeated ▁O leg ▁Og or od ov ▁in ▁the ▁fourth ▁rub ber , ▁to ▁help ▁the ▁C ze chs ▁secure ▁a ▁clean ▁swe ep . ▁ ▁K ral ert ▁qualified ▁for ▁his ▁only ▁Grand ▁S lam ▁tournament ▁in ▁ 2 0 0 0 , ▁at ▁the ▁US ▁Open . ▁He ▁had ▁a ▁win ▁over ▁Spain ' s ▁David ▁San chez ▁in ▁the ▁first ▁round , ▁then ▁lost ▁in ▁the ▁second ▁round ▁to ▁Ag ust ín ▁Call eri . ▁ ▁Ch allen ger ▁titles ▁ ▁Singles : ▁( 2 ) ▁ ▁References ▁ ▁Category : 1 9 7 9 ▁birth s