The newspaper sparked outrage on Thursday when it published the headline alongside pictures of Lukaku and Roma defender Chris Smalling, ahead of Inter’s clash with the capital club in Serie A on Friday.
Lukaku has already been subjected to racist abuse this season, when he was the target of monkey chants by Cagliari fans in September.
And his agent Federico Pastorello called for more serious action to be taken after seeing Lukaku at the centre of another racism controversy.
“Being Italian I'm really ashamed to read a title like that but I really don't want to talk about a single episode," Pastorello told Sky Sports News.
"At the end of the day the racist problem is a big problem. Unfortunately we are living in 1920. It's really a culture problem.
"Being an agent we are trying to protect our clients from this huge problem because it's not only a newspaper but it's a problem you can breathe in the stadium, in social media, on the street.
"I think it's a problem that is a culture problem. What I would like and wish for the future is institutions could take it more seriously. There were some episodes in Champions League recently, also in Serie A games and the institution did not take so seriously the problem."
When asked about Lukaku’s response, he said: "He is very sensitive on this problem. I like his attitude because he's facing it every time with strength and power.
"Not for him but the other players who are weaker than him and can't (impact on the issue).
"For sure he is not happy about that but he's strong enough to face it."
The editor of the newspaper, Ivan Zazzaroni, attempted to defend the headline with a post on the Corriere dello Sport website.
He wrote: "'Black Friday', for those who want to understand it and can understand it, was only praising diversity, taking pride in diversity, the magnificent wealth of diversity. If you don't understand it, it's because you can't do that.
"It's an innocent article, perfectly argued by (journalist) Roberto Perrone, that has been made poisonous by those who have poison inside them."
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