Neil Lennon has warned his Celtic players that they will be sacked instantly if they are found guilty of any form of discrimination.
"We are an open club and we have been since the club was formed 125 years ago.
"I have a zero tolerance rule. I have spoken to the players about this before.
"Any sign of any sort of racism against colour, religion, background will be an instant sackable offence.
"I don't have to really speak to my players about that. The spirit and respect they have for each other is tremendous but they have been made well aware of that before.
"Any racism against colour, religion, background will be an instant sackable offence." - Neil Lennon
"There is no place for that (discrimination) in the game and there never should have been.
"At this club we see everyone as equal and all I see are footballers and men and we treat them that way."
And Lennon has also hit back at former Barcelona star Bernd Schuster who criticised Celtic for their tactics in the Nou Camp.
The former West Germany midfielder, who also played for and managed Real Madrid, accused the Scottish champions of being too negative in their Group G clash with the Catalan giants which ended in defeat for the visitors when Jordi Alba scored an injury-time goal for the home side.
The Parkhead side were widely praised for their display but Schuster was quoted as saying: "I'm fed up of seeing these type of matches.
"It's just the ramblings of someone who has failed as a coach" - Lennon
"There should not be teams like Celtic in the Champions League."
Lennon was both sarcastic and scathing with his retort.
"It's just the ramblings of someone who has failed as a coach," said the former Hoops skipper.
"I am disappointed that the media here wanted to emphasise his thoughts on the game.
"I was sitting there 60 minutes into the game thinking 'God what is Bernd Schuster thinking of our performance here, I better change it'.
"I did go with two strikers and I did bring on James Forrest and Kris Commons.
"I didn't set out to be defensive but sometimes Barcelona can get a grip of the opposition and not let go.
"So I don't take too much notice of Bernd Schuster, I am more into the thoughts of Gordon Strachan, Martin O'Neill and the Alex Ferguson's of this world, who I would take advice from before anyone else."