Sánchez made her professional debut on 15 November 2013, scoring a first-round technical knockout (TKO) victory against Lorena Noemi Gomez at the Gimnasio Municipal in Pergamino, Argentina.
Sánchez captured her first title from a major sanctioning body, albeit an interim version, after defeating Santana by a wide unanimous decision (UD) over ten rounds.
[9] She bounced back from defeat with a first-round TKO victory against Verena Crespo in March 2017,[10] before attempting to regain the IBF title, she was stripped of, facing reigning champion Maïva Hamadouche on 18 May at the Cirque d'hiver in Paris, France.
[12] Two days after capturing the WBA title, British promoter Eddie Hearn announced that a deal had been made for Sánchez to face 2012 Olympic gold medalist Katie Taylor on 28 October 2017 at the Principality Stadium in Cardiff, Wales, live on Sky Sports Box Office as part of the undercard for Anthony Joshua vs. Kubrat Pulev (Pulev was later replaced by Carlos Takam).
[14] In a fight which saw Sánchez dropped to the canvas from a left hand to the ribs in the second round, she went on to suffer her third professional defeat, losing by a wide UD with all three judges scoring the bout 99–90.
[19] Her next fight was a WBC final eliminator—with the winner securing a shot at former conqueror Jessica McCaskill—against former IBO female lightweight champion Chantelle Cameron on 9 November 2019 at the York Hall in London, England.