Vocalist Saúl Hernández talks about the new direction his music is taking and the historic moment Mexico is experiencing.

The Mexican National Team and its fans have chosen the anthem to accompany their historic match against England on Sunday (July 5) at the Ciudad de México Stadium in the FIFA World Cup Round of 16. The song is “Aquí No Es Así,” a well-known track by the iconic Mexican band Caifanes, which the team and its supporters are using to inspire hope and unity ahead of the match.

The track went viral in a video posted Thursday (July 2) on the Mexican team’s social media, surprising vocalist Saúl Hernández. Two days earlier, Hernández had attended the Mexico versus Ecuador match at the Ciudad de México Stadium (formerly Estadio Azteca) with his son, at the invitation of selected player César “Chino” Huerta.

“Many of my songs are about an existential search — who we are, where we’re going or what we want. All those questions appear in my particular way of creating,” Hernández tells Billboard Español. “That’s what people hear; there’s a much deeper connection, perhaps with this understanding that the greatest battle of your life is the one in the mirror.”

“Aquí No Es Así” is part of Caifanes’ legendary album El Nervio del Volcán (1994), with lyrics co-written by Hernández, drummer Alfonso André and the band’s former guitarist, Argentine-Mexican Alejandro Marcovich, who is currently in a coma after suffering a stroke on May 19.