Chelsea captain John Terry has spoken out following the incident on Tuesday night where a group of the club's fans chanted about being racist and pushed a black man off a train.
In the match day programme for Saturday's game against Burnley the captain, who was fined by the FA and banned for four games for racially abusing QPR defender Anton Ferdinand in 2012, wrote a letter to fans under the heading "football is for everyone and that is why we love it".
This is our annual Game for Equality, when we show that this club stands against all forms of discrimination.
Football is a sport for everyone, that is one of the main reasons why we love it, and what happened on the Paris Metro on Tuesday was unacceptable.
The club has reacted quickly to deal with the situation and will continue to do so.
After footage of the incident, in the build-up to Chelsea's Champions League clash against PSG, was published by the Guardian, Chelsea issued a strong statement and banning orders for five fans.
A separate group of Chelsea fans subsequently set up a fund raising campaign to get the man attacked on the metro a set of tickets and accommodation for a game at Stamford Bridge. Perhaps understandably, he turned down the offer.