Coco Gauff's Olympic journey ended in heartbreak as she lost to Croatia's Donna Vekic, 7-6, 6-2, during a controversial match that saw Gauff in tears over a disputed call. The incident involved a line call that Gauff argued was made prematurely, leading to a heated exchange with the chair umpire that delayed the match. Gauff expressed her frustration, emphasizing her need to advocate for herself on the court and calling for video review technology in tennis. Meanwhile, Rafael Nadal advanced to the men's doubles quarter-finals alongside Carlos Alcaraz, keeping alive his quest for a third Olympic gold. Gauff's emotional exit highlights the pressures faced by young athletes on the Olympic stage.