Whakaotihia te rerenga e whai ake nei: I te wā i whakahaerehia ai e tōna whenua o Kariki te 2004 Summer Olympics i Athens, i eke a Matsa ki te Olympics i te tau kotahi tekau mā whitu, e whakataetae ana i ngā whakataetae kaukau e rua. I whakairihia e ia he paerewa FINA B o 25.61 (50 m freestyle) mai i tetahi huihuinga whakamatautau Orimipia i te Athens Olympic Aquatic Center. I te ra tuatahi o nga Taakaro, i hono atu a Matsa ki a Nery Mantey Niangkouara, Eleni Kosti, me Zoi Dimoschaki i te relay 4 × 100 m freestyle. I whakawakia ia mo te tiimata wawe o te reanga, i te wa i whakakorea ai nga Kariki mai i nga werawera. Tata ki te wiki i muri mai, i te
50 m freestyle, I whakanohoia a Matsa i te toru tekau ma toru i nga waahanga o te ata. I te kaukau i te wera e whitu, i eke ia ki runga i a Sharntelle McLean o Trinidad me Tobago ki te tiki i te tuawhitu o nga wahi e wha-tekau o te tuarua (0.40) i roto i te 26.46.