Ronaldo has been on the brink of leaving Real Madrid after he claimed he was being treated like a criminal when authorities launched a £13m tax probe.
And Neymar has reportedly also said his piece over messaging app Whatsapp.
Spanish website Diariogol said ‘colours were put to one side’ as the Brazilian sent a note of support to the Portuguese.
The duo share the same birthday, while Neymar is also dealing with his own tax investigation dramas.
He is set to stand trial over fraud and corruption allegations dating back to his 2013 move to Barcelona from Santos.
While Ronaldo is representing Portugal at the Confederations Cup in Brazl
The support of Perez is said to have helped sway Ronaldo’s thoughts after a mega-bid was reported to be coming in from Manchester United.
The Red Devils and and Paris St-Germain were on red alert after revelations that Ronaldo wanted to leave Spain.
Perez, who has been re-elected as Real president, claimed the tax issues facing Ronaldo were a “misunderstanding” but admitted he is yet to speak with Ronaldo.
“Cristiano has a contract and he is a Real Madrid player. I have not talked with Cristiano,” said Perez on Spanish radio.
“The last time that I talked with Cristiano was in Cardiff, after the game. What happened with the tax authorities was after the game.
“Life throws up unexpected situations but one has to take them on and find a solution.
“This is all very strange. Cristiano is a good guy, I will have to talk with Cristiano and see what’s happening.”