Together with Márton Bukovi and Gusztáv Sebes , Guttmann formed a triumvirate of radical Hungarian coaches who pioneered the 4 -- 2 -- 4 formation and he is also credited with mentoring Eusébio .
Together with Márton Bukovi and Gusztáv Sebes , Guttmann formed a triumvirate of Hungarian coaches who pioneered the 4 -- 2 -- 4 formation . Guttman is also credited with mentoring Eusébio .