Millwall could be in more trouble with the Football Association after their fans targeted Tottenham Hotspur forward Heung-min Son with racist chants during Sunday’s FA Cup quarter-final.

South Korea international Son was subjected to chants of ‘DVD’ and ‘he’s selling three for a fiver’ by a section of the travelling Millwall fans at White Hart Lane.

The reference to selling DVDs is widely known to be a racist term when aimed at Asian footballers.

Son did not let the abuse get the better of him, as the 24-year-old scored a hat-trick in Tottenham’s 6-0 victory over their League One opponents that clinched a semi-final place.

Tottenham substitute Kyle Walker appeared to acknowledge the chanting that had been aimed at Son by celebrating his first goal by pointing towards the Millwall fans.