On Tuesday, Ronaldo was told to appear in court on July 31, while Mourinho was accused by a state prosecutor of defrauding Spain's Tax Office of 3.3 million euros ($3.7 million).
The four-time World Player of the Year said last week that his "conscience is clear" and is threatening to leave Real over the affair. Ronaldo is in a major tournament with his country and until that is over I can not talk to him.
Manchester United and PSG were instantly linked with moves while Express Sport understands Chelsea also hold an interest.
In an interview with Spanish outlet Marca, Perez stated: "I think this [tax issue] is the worst thing that has been set upon Cristiano, and I agree with him".
FC's Mark Ogden addresses the latest news on Cristiano Ronaldo and looks ahead to his upcoming press availability. "And I'm not contemplating that, especially without speaking with him".
The Portuguese worldwide is now in Russian Federation competing for the European champions in the Confederations Cup.
The Sun also reports that United are anxious he is just using them to get Madrid to give him a new and improved contract.
Professional football player Cristiano Ronaldo is rumored to be leaving Real Madrid soon and there is talk that he might go back to former team Manchester United. "I'm sure he will speak to us about what has happened (with the tax case), which has obviously affected his credibility, and we'll see what happens".
Mendes' agency, Gestifute, released a statement saying Mourinho had not received any official notification about the accusations against him.
Theo Hernandez spent last season on loan with Alaves and helped the newly promoted club finish ninth in La Liga.
He added Ronaldo's buyout clause is £1 billion, and no clubs have made any offers so far. "The truth is that we have great goalkeepers".