Manchester City were set to miss out on two seasons of European football after it emerged that the club had breached some rules in their financial dealings.
However, the ban was lifted by the Court of Arbitration for Sports (CAS) to the dismay of many football followers and both Klopp and Mourinho have reacted to the decision.
“I am happy that City can play in the Champions League but I don’t think it was a good day for football yesterday, to be honest,” Klopp said.
“Just because I think FFP is a good idea.
“It’s there for protecting teams, protecting the competition.
“That was the idea at the start, that nobody overspends and stuff like this.
“If you start doing it so that nobody cares anymore, the richest people or countries can do what they want to do and that would make the competition really difficult.
“I think that would automatically lead to a world super league, with like 10 clubs.”
Mourinho also added his view calling the decision a disgraceful one.
“It’s a disgraceful decision,” Mourinho noted.
“If Man City is not guilty of it, to be punished by some millions is a disgrace.
“If you’re not guilty you’re not punished.
“In the other way, if you’re guilty you should be banned.
“In any case, it’s a disaster.
“In this moment, we are speaking about Man City but in the past, other clubs were in a similar situation, and you know the results of it.
“So I think it’s better to open the circus door, and let everybody enjoy.
“And go inside for free, come out, go inside again, do it with freedom.”