Lya Isabel Fernández Olivares (born 24 July 2007) is a Mexican tennis player.
She reached a best singles ranking of world No. 702 in November 2022. On the ITF World Tour, she has won one title in singles.
Career In 2022, Fernández Olivares won her first title in singles in Cancún, Mexico.
Fernández Olivares made her WTA Tour singles debut at the 2023 Guadalajara Open where she entered the main draw as a wildcard player, losing in the first round to Hailey Baptiste.
ITF Circuit finals Singles: 3 (1 title, 2 runner-ups) LegendW15 tournaments (1–2)Finals by surfaceHard (1–2) ResultW–LDateTournamentTierSurfaceOpponentScoreLoss 0–1 Jul 2022ITF Cancún, MexicoW15 Hard Victoria Rodríguez 3–6, 1–6Win 1–1 Jul 2022ITF Cancún, MexicoW15 Hard Sophia Biolay 6–3, 6–2Loss 1–2 Aug 2022ITF Cancún, MexicoW15 Hard Eryn Cayetano 2–6, 2–6
Doubles: 2 (2 runner-ups) LegendW15 tournaments Finals by surfaceHard (0–2) ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss 0–1 Mar 2026ITF Huamantla, MexicoW15 Hard Sarah Victoria Nita Sofía Elena Cabezas Domínguez Miriana Tona 3–6, 3–6Loss 0–2 May 2026ITF Monastir, TunisiaW15 Hard Luciana Moyano Lavinia Luciano Matilde Mariani walkover
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