Tottenham Hotspur has called on social media companies to take action after forward Son Heung-min was subjected to "utterly reprehensible" online racist abuse during the club's 2-0 Premier League win over West Ham United on Sunday.
South Korea captain Son, 30, scored Spurs' second goal four minutes after coming on as a substitute in the London derby.
"We have been made aware of the utterly reprehensible online racist abuse directed at Heung-min Son during today's match, which has been reported by the club," Tottenham said in a statement on Twitter.
"We stand with Sonny and once again call on the social media companies and authorities to take action."
In August, Chelsea banned a season ticket holder indefinitely after Son was racially abused during a 2-2 draw with Spurs at Stamford Bridge.
This month, anti-racism group Kick It Out called on social media companies to introduce "meaningful reforms" after Brentford striker Ivan Toney was subjected to racial abuse on Instagram.
Toney was targeted on Feb. 11 after his equalizer in Brentford's 1-1 draw with Arsenal was not ruled out by VAR for offside.