Tottenham are investigating alleged racism aimed at the club's forward Son Heung-min.
South Korea international Son was allegedly targeted during Sunday's Premier League game against Manchester United at Wembley.
A Spurs season-ticket holder who was at the game made the allegation via social media.
The fan said a derogatory term was used towards Son and came from a supporter in the Tottenham section of the Wembley crowd.
Tottenham confirmed to Omnisport on Monday the club is investigating the alleged offence.
United won the game 1-0 thanks to a goal late in the first half scored by Marcus Rashford.
Son has been a key player for Spurs this season, scoring eight Premier League goals in 17 appearances.
The 26-year-old forward travelled to the United Arab Emirates after the United loss to join his South Korea team-mates for the Asian Cup.
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