The first leg of the Clausura 2026 quarterfinals between América and Pumas is stirring up major controversy, with allegations of an improper lineup against the azulcrema side. The drama centers on Sebastián Cáceres, who suffered a facial blow that triggered the concussion protocol, forcing him off the field. Prior to the incident, América's coach Jardine and his staff had planned tactical adjustments, including bringing on Miguel Vázquez. However, after the Uruguayan defender went down, they opted against the substitution.

This decision has sparked a protest from Pumas, who claim that Cáceres had already left the pitch and was then pushed back on to apply the protocol, making the lineup illegal. But according to "El Cantante" Guerrero, it's not a violation. He argues that Cáceres never fully exited the field of play, so under the rules, it's not considered a completed substitution. "There is nothing against the rules in this action. The concussion substitution is carried out, and that's it," Guerrero explains.

For fans and analysts alike, this incident highlights the complexity of substitution rules in high-stakes matches. As the debate rages on, it's a reminder of how even the smallest details can ignite major controversies in football. Stay tuned for updates as this story develops.