And he has called on the Stamford Bridge outfit and other top clubs to include a code of conduct in all their stars’ contracts.
Triesman said: “Large numbers of people around the world, especially black people, will read about what has happened. And they will wonder how on earth did Chelsea allow that?
“The club’s international reputation has suffered. Its brand has been damaged.
“They should be saying it isn’t acceptable as a standard of behaviour.
“If I was a Chelsea fan I wouldn’t be happy that my club was getting this kind of negative coverage.
“If it happened with any other business corporation, like Coca-Cola say, an employee would have been in serious trouble with that organisation.”