David Realista Grachat (akaberekwa musi wa 21 Ndira 1987) mutambi wePortugal, anokwikwidza mumakwikwi eS9. Akakwikwidza paMitambo yeParalympic yeZhizha mitatu, 2008 muBeijing, 2012 muLondon
uye muna 2016 muRio. Grachat akahwina menduru pazvose zviri zviviri zveEuropean uye zveNyika, uye anonyanya kuita 400m freestyle.