Chelsea are investigating possible racist abuse of Heung-Min Son during the 2-2 draw with Tottenham on Sunday.
The incident happened as the Spurs striker took a corner kick past the Shed End.
According to The Athletic, the Blues are aware of a video which appears to show a fan aiming a racist gesture at the South Korean.
It is understood Chelsea are probing the footage to identify the supporter.
Manchester United have suspended three season ticket holders in 2021 for abusing Son online after the Red Devils’ 3-1 win at Tottenham.
In 2019, a West Ham fan was fined for racially abusing the Spurs striker in a Carabao Cup tie.
Meanwhile, Chelsea manager Thomas Tuchel is being investigated by the FA after post-match comments about referee Anthony Taylor.
The Blues boss has questioned whether Taylor should referee Chelsea games after Spurs were allowed two controversial goals.
Tuchel and Tottenham manager Antonio Conte have been charged by the FA after being shown red cards for clashing on the touchline during the heated encounter.
Conte and Tuchel will likely take charge of their teams this weekend as suspensions are not automatic.
You can listen to Tottenham’s game with Wolves, with the Italian in the dugout, live and exclusively on talkSPORT at 12.30pm on Saturday August 20.
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