He helped Tottenham win the FA Cup in his third season there (1980–81), and collaborated with pop duo Chas & Dave as well as the rest of the Tottenham players for a song, "Ossie's Dream". He played a big part in another FA Cup triumph the following year, but did not play in the final because it had already been arranged with the Spurs management that he would leave early to join up with Argentina's 1982 World Cup squad. At that tournament he wore the number 1 shirt, as Argentina's policy at the time was to number their players alphabetically by surname, with an exception made so Diego Maradona could wear his preferred number 10.