Arsene Wenger has laughed off Jose Mourinho's suggestion that Manchester City should be deducted points for abusing Financial Fair Play regulations.
The Chelsea boss took aim at the Premier League champions on Friday, claiming they have flouted Uefa's rules but Wenger has hinted the Blues also belong in that category.
Speaking at his pre-match press conference, the Frenchman smiled when asked if he believed clubs should suffer points deductions for failing to comply with FFP regulations, as Mourinho suggested.
He replied: "I think we have a good sense of humour here.
"Look, the financial fair play rules have to be respected by everybody and if one club has always respected the financial fair play - and you can underline 'always' - it's Arsenal, then we do not have to talk about that."
City have been hit hardest this season, having their Champions League squad reduced from 25 players to 21 for financial mismanagement, and Manuel Pellegrini continued to push the limit, signing Wilfried Bony for approximately €35 million.
And Wenger feels that there is still too much confusion surrounding the finer details of FFP, adding: "It depends what you call financial fair play, as that notion has changed, you know.
"Is it is just your income created by the gates? Is it the gates and commercial? Then you can already start to be creative.
"Is it only the gates and the television? Is it naming rights as well? It is not clear to people what financial fair play means; the rules are very complicated. The Premier League rules and European rules are different already. You have to be aligned so everybody knows exactly what it means.
"We are a popular sport so you want clear and simple rules for everybody to understand. If I ask 10 people in the street today and if you ask me, and I am in the job, I don't have a clear idea anymore of what it means. I would like the rules to be clear and that everybody respects them."