Juan Alejandro Hernández Serrano (more commonly known as Alex Hernández (born 23 June 1999) is a Mexican professional tennis player. He has a career-high ATP singles ranking of No. 409 achieved on 12 January 2026 and a doubles ranking of No. 297 achieved on 21 September 2026. He is currently the No. 2 singles player from Mexico.
Career 2022-2024: ATP debut and first wins, top 500 Hernández made his ATP main draw debut at the 2022 Abierto Mexicano Telcel after receiving a wildcard into the singles main draw. He lost to Pablo Andújar after winning only one game. At the 2022 Los Cabos Open he won his first round match against lucky loser Colombian Nicolás Barrientos becoming the first Mexican in the singles history of the tournament to win a match in the main draw. Hernández played second seed Félix Auger-Aliassime in the next round and lost in straight sets. As a result, he moved more than 50 positions up in the rankings into the top 500 and the following week reached a new career-high ranking of No. 462 on 15 August 2022.
He received a qualifying wildcard for the Challenger 125, the 2023 Mexico City Open but lost in the first qualifying round to Evan Zhu and for the 2024 edition and this time advanced to the main draw after qualifying.
2025-2026: Top 350 in doubles Hernández also received a wildcard for the new Challenger 125 tournament in Mexico, the 2025 Morelia Open and defeated Colombian Nicolás Mejía in the first round and eight seed Juan Pablo Ficovich in the second recording his biggest win of his career thus far, to reach his first Challenger quarterfinal.
Ranked No. 493 at the 2025 Los Cabos Open as a wildcard entry, Hernández recorded his second and biggest career ATP win over world No. 155 Daniel Taro, after he trailed 3-6, 2-5, and reached a new career ranking of world No. 431 on 21 July 2025. Ranked No. 499, Hernández again qualified for the 2026 Los Cabos Open defeating compatriot Alan Magadan.
ATP Challenger Tour finals
Doubles: 2 (1 title, 1 runner-up) LegendATP Challenger Tour (1–1)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreWin1–0Challenger de Guayaquil, EcuadorChallengerClay Rodrigo Pacheco Méndez Lucio Ratti Victor Hugo Remondy Pagotto7–5, 6–3Loss1–1Soma Bay Open, EgyptChallengerHard Rodrigo Pacheco Méndez Erik Grevelius Adam Heinonen2–6, 3–6
ITF World Tennis Tour finals
Singles: 3 (3 runner-ups) LegendITF WTT (0–3)
ResultW–LDateTournamentTierSurfaceOpponentScoreLoss0–1M15 Huamantla, MexicoWTTHard Eric Hadigian3–6, 2–6Loss0–2M15 Huamantla, MexicoWTTHard Garrett Johns6–4, 0–6, 6–7(5–7)Loss0–3M15 Villahermosa, MexicoWTTHard Dan Martin7–5, 2–6, 3–6
Doubles: 5 (5 runner-ups) LegendITF WTT (0–5)Finals by surfaceHard (0–4)Clay (0–1)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss0–1M15 Cancún, MexicoWTTHard Mauricio Astorga Fernando Yamacita Eduardo Ribeiro4–6, 4–6Loss0–2M15 Cancún, MexicoWTTHard Alan Fernando Rubio Fierros Trey Hilderbrand Noah Schachter5–7, 1–6Loss0–3M15 Villahermosa, MexicoWTTHard Rodrigo Pacheco Méndez Noah Schachter Herbert Jody Maginley4–6, 4–6Loss0–4M15 Antalya, TurkiyeWTTClay Rodrigo Pacheco Méndez Gökberk Sarıtaş Mert Naci Türker6–3, 6–7(4–7), [10–12]Loss0–5M25 Santo Domingo, Dominican RepublicWTTHard Luis Carlos Álvarez Lucca Pignaton Lucas Andrade da Silva4–6, 4–6
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