According to Spanish sports daily Marca, Ronaldo has told his teammates: "I'm leaving Real".
Manchester United manager Jose Mourinho has released a statement through his agent Jorge Mendes' company Gestifute to stress that he is "in compliance" with all his tax obligations and has not heard anything to the contrary from the Spanish tax authorities.
Ronaldo is just the type of player who justifies ripping up any plan, however, and his recent record - not to mention what was his best ever performance in a Champions League final, of all fixtures - hardly indicate he would be an Andriy Shevchenko-style 2006 signing for Mourinho.
There has been no interest from any club in Real Madrid's star player Cristiano Ronaldo, who has threatened to leave Spain after running into problems with tax authorities, according to club president Florentino Perez.
However Mourinho could yet be overruled about Man United's pursuit of the Portuguese star.
Going to Real Madrid at a tender age where players are already developed will be hard and could delay Mbappe's progression.
Last week, Ronaldo was accused by a state prosecutor of four counts of tax fraud totaling $16.5 million. The Portugal forward is now under official investigation and will have to appear in the Pozuelo de Alarcon court No. 1 on July 31.
Outraged at being unfairly treated by Spanish tax authorities, Ronaldo had earlier expressed his intentions to leave Real Madrid and Spain.
Hampshire Pride chief slams Theresa May over DUP talks
Although it definitely appears that May is struggling, her party still has the strongest claim to form a minority government. The DUP and Sinn Fein are taking part in Thursday's talks at Downing Street, along with smaller parties.
Ronaldo has denied any wrongdoing, and Madrid issued a statement last week saying it believed the player was innocent.
But the situation has stuck in the craw for Ronaldo, leading the Portugal captain to tell those close to him that he wants to quit the club and the country.
In a statement released on Tuesday, a prosecutor in Madrid said the 54-year-old had committed two counts of tax fraud in 2011 and 2012, saying that "corporate structures were used by the accused in order to hide revenues generated from his image rights".
It will be up to a judge to decide whether to take Mourinho to court.
The law firm also promised to show the public several documents to prove that Ronaldo never committed the act of fraud concerning his taxes.
Barcelona star Lionel Messi was sentenced to a 21-month jail sentence and 2.09-million-euro fine past year for tax fraud.
The Argentine was handed a 21-month jail sentence - suspended as a first-time offender for non-violent crimes - and slapped with a fine of 2.1 million euros.