Un gancho al corazón (English title: A Blow to the Heart)[2] is a Mexican telenovela produced by Angelli Nesma Medina for Televisa that aired from August 25, 2008, to June 26, 2009.

Roberto "Beto" Ochoa is her trainer and boyfriend, who puts her under pressure to train and win so he can get money for himself and his mother, Nieves.

Constanza, Jeronimo, and Óscar, an unloyal employee of Sermeño Group, join forces to split Mauricio, "Monita", and the kids apart.

Beto starts to fight in lucha libre as "El Fantasma Vengador" in order to bring in income so that Valentina feels better about him.

[9][10] To prepare for her role, Danna García received advice from several boxers like Jesús Martínez, Mariana Juárez and Ana María Torres.