Luca Bruno/Associated Press
To those present at Cagliari’s Stadio Sardegna on Sunday, the sounds were familiar.
As Inter Milan’s new Belgian striker, Romelu Lukaku, stepped up to kick what would turn out to be a match-winning penalty, Cagliari fans behind the goal engaged in a prolonged round of monkey chants. They continued as the shot by Lukaku, who is black, struck the back of the net.
The outburst was not the first of its kind in the arena — Cagliari fans racially abused a black Juventus player last season — and it was swiftly condemned after video of the incident circulated on social media.