Dee ihe ọzọ maka paragraf a - Van Rooijen hapụrụ United States na Jenụwarị 2001 iji gụọ akwụkwọ na Mahadum Miami. O debere ebe ya na ndị otu mba n'oge 2001 World Aquatics Championship na Fukuoka, Japan nke mechara bụrụ ihe na-akụda mmụọ. Na relays abụọ, 4 × 100 m na 4 × 200 m freestyle, ya na ndị otu ya kpochapụrụ na ọkụ. O ruru agba ikpeazụ nke mbụ ya na 2002 na Berlin na 2002 European Aquatics Championships
ebe ọ bụ onye nke asatọ n'ọsọ mita 200 n'ike. Enwekwara ọla nchara maka ya na 4 × 100 m freestyle relay ọnụ na Marleen Veldhuis, Chantal Groot na Wilma van Hofwegen na ebe nke 5 na 4 × 200 m freestyle. Na 2003 World Aquatics Championships na Barcelona ọ furu efu maka nrite mmeri ụwa site na imecha 4th na 4 × 100 m freestyle. O nwetakwara ebe nke asaa na 4 × 200 freestyle. Mgbe afọ atọ gachara, ọ laghachiri n'ụlọ wee chọta ebe na Dordrecht, na Topzwemmen West-Nederland n'okpuru nduzi nke onye na-azụ ọzụzụ Dick Bergsma mana ọ gaghị eru eru maka asọmpi Olympic nke 2004 n'ihi mmerụ ahụ dị njọ n'ubu.