 Nyora kupfuurira kweiyi ndima - Pa1998 World Aquatics ChampionshipsMuPerth, kuAustralia, Borges akapedza ari wechishanu pakumhanya kwemamita 100 akasununguka, wechisere pakumhanya kwemamita 200 akasununguka uye wechitanhatu pakumhanya kwemamita 4×100 akasununguka. Pakupera kwa1998, Borges aive chikamu chechikwata cheBrazil icho chakaputsa rekodhi renyika yechitatu yakateedzana mu4 × 100 metres freestyle relay pane pfupi kosi. Musi waZvita 20, nguva pfupi yapera Jose Finkel Trophy, Fernando Scherer, Carlos Jayme, Alexandre Massura naGustavo Borges, zvichiteerana, vakawira mudziva paClub de Regatas Vasco da Gama nenguva ye3: 10.45, iyo yaizongoputswa muna 2000 nechikwata cheSweden. Mumutambo mumwe chetewo, Borges akaputsawo rekodhi yekuSouth America mumamita zana akasununguka munzira pfupi nenguva yemasekondi 47.14 uye rekodhi yemamita mazana maviri akasununguka nenguva ye1:44.40, yekupedzisira rekodhi yekushambira yebasa rake. 