The Duke of Cambridge has called for racist abuse aimed at footballers to stop, calling it "despicable".
On Sunday, Greater Manchester Police began an investigation into the abuse.
And writing on Twitter, Prince William, who is also the president of the Football Association, praised those who had spoken out.
He said: "Racist abuse - whether on the pitch, in the stands, or on social media - is despicable and it must stop now.
"We all have a responsibility to create an environment where such abuse is not tolerated, and those who choose to spread hate and division are held accountable for their actions.