Inter Milan have launched an anti-racism campaign which aims to reclaim the so-called "buu" sound often associated with racist insults.
A video was released on Saturday as Inter prepared to play a second match, without spectators, after some fans made racial insults at Napoli's Senegalese defender Kalidou Koulibaly during a match on Boxing Day.
The video features former players such as Luis Figo, Javier Zanetti and Samuel Eto'o.
The campaign turns the letters of the word "buu" into an acronym for "Brothers Universally United."
Inter were ordered to close their stadium to the public for two games following the match on Boxing Day.