Tottenham have released a statement reminding supporters of their responsibilities ahead of the match at bitter rivals West Ham on Saturday.
It reads: "All of our supporters travelling to Upton Park are doing so as ambassadors of the club and we would ask that they behave in a manner of which we can be proud.
"The club does not tolerate discrimination of any sort, on the pitch or in the stands, and we shall also take appropriate action against anyone heard using abusive, offensive or obscene language. Our fans generate a fantastic, positive atmosphere both at the Lane and on our travels and we hope everyone continues to focus their energies on cheering the team on."
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