Chelsea say they are “disgusted” after right-back Reece James was racially abused on social media.
James, 21, posted a screenshot of racist messages he had received via Instagram on Friday, with the caption “something needs to change”.
“This club finds racism and all forms of discriminatory behaviour completely unacceptable. We totally condemn it,” Chelsea said in a statement.
James is the latest player to receive racist abuse on social media this week.
On Friday, West Brom said they had contacted police over an alleged racist message sent to midfielder Romaine Sawyers.
Manchester United players Axel Tuanzebe and Anthony Martial were also racially abused on social media after Wednesday’s home defeat by Sheffield United.
“In sport, as in wider society, we must create a social media environment where hateful and discriminatory actions are as unacceptable online as they would be on the street,” Chelsea’s statement added.
“We add our voice to those urging social media platforms and regulatory authorities to take stronger, more effective and more urgent action against this despicable behaviour.
“Something needs to change and it needs to change now.”
Earlier on Friday, Premier League chief executive Richard Masters condemned the abuse received by players, saying he was “appalled”.
“Racist behaviour of any form is unacceptable and nobody should have to deal with it,” he said.