Kammala wannan jumla: A Wasannin Olympics na 2004 a Athens, Felgueiras ya sake cancanta don 200 m butterfly ta hanyar yin amfani da FINA B-cut na 2:13.08 daga
Gasar Zakarun Turai a Madrid. Ta kalubalanci wasu 'yan wasa bakwai a daidai wannan zafin kamar Sydney, gami da Éva Risztov ta Hungary. Ta yi tsere zuwa matsayi na shida ta hanyar 0.54 na biyu a bayan abokin wasan Risztov Beatrix Boulsevicz, wanda ya dace da mafi kyawunta da lokacin shigarwa na 2:13.08. Felgueiras ta kasa ci gaba zuwa wasan kusa da na karshe, yayin da ta sanya na ashirin a gaba daya a cikin wasan farko.