Born in Montreal in 2000, Fernandez began playing tennis on a family court by age six and quickly dominated the national junior scene, winning back‑to‑back Canadian Junior Championships and earning a place on the national squad. Those formative years established a technical foundation and a competitive hunger that would later fuel her ascent.
The 2021 US Open marked the apex of her early career, as the 20‑year‑old navigated a field of top‑ten international players to reach the final. A dramatic five‑set battle against Emma Raducanu showcased her resilience, while her performance attracted media attention and vaulted her into the top‑ten rankings.