The 19-year-old became the first swimmer from Argentina to clinch three gold medals at the Pan American Games, with her Lima 2019 exploits cementing Delfina's place as a sporting superstar in her nation. But the two-time YOG silver medallist told us she "can't relax, because you have to keep training ahead of the Olympics, which are just around the corner." She's already qualified for Tokyo 2020. Can she go one better there than at Buenos Aires 2018 and claim gold?