Manchester United are threatening Liverpool's deal for Pachuca striker Marco Bueno. Bueno is expected to join Liverpool later this summer when he turns 18.
However, United are battling Liverpool for the services of Pachuca duo Bueno and winger Hector Herrera, according to the club's owner.
Jesus Martinez told Raza Deportiva: "It's not just Liverpool, Manchester United are also after Marco and Hector."