England winger Jadon Sancho fears players will start to fall out of love with football if instances of racism continue to blight the game.
On Sunday, Inter striker Romelu Lukaku was targeted by monkey chants before he converted a decisive penalty in his team's 2-1 win over Cagliari in Serie A.
It marked the latest flashpoint of recent weeks, where the likes of Paul Pogba, Tammy Abraham and Kurt Zouma have all suffered online abuse.
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Speaking to reporters after joining up with England for their Euro 2020 qualifiers, Borussia Dortmund winger Sancho praised Lukaku's defiant response in Sardinia but expressed long-term fears over the consequences should such sickening incidents continue to occur.