Real Madrid star Cristiano Ronaldo favours a return to Manchester United this summer.PSG have contacted Real Madrid with a 'substantial offer' for the former Old Trafford idol.

The Sun says Ronaldo's decision will not come down purely to cash.

If he is going to leave, his preferred destination would be Old Trafford.

Ronaldo has refused to sign a new contract at the Bernabeu. He has two years left on his current deal and said he would be willing to let it run and leave Real for nothing.

That is why the Spanish giants could be ready to do business as his value will decrease each year he stays.

 Is now the best time for Real to cash in on Ronaldo? Give us your shout below...