Real Madrid are in talks over a new kit deal with Under Armour.
Marca says on the table is a multi-year deal worth a stunning €150 million-a-year.
Under Armour have made an aggressive move into football and count Tottenham among their partners.
The deal with Real Madrid would require them to break their contract with adidas, which runs to 2020.
The Under Armour agreement will be the richest in football history, smashing the current high of €95 million-a-year adidas has with Manchester United.