Premier League giants Chelsea are investigating allegations that Tottenham forward Son Heung-min was the victim of racist abuse during their clash at the weekend.
The two London rivals played out an intense game on Sunday, which ended 2-2.
Both managers, Thomas Tuchel and Antonio Conte, were involved in two bust ups during and right after the game.
The Athletic reports that there is footage showing a fan making a racist gesture towards Son as he was taking a corner.
There has been no public comment by Chelsea about the alleged incident.
However, the source states that the club is conducting a full investigation into the matter.