Manchester United must overcome mega rich PSG to bring Real Madrid star Cristiano Ronaldo back to Old Trafford this summer.The Sun says the French Ligue 1 leaders have contacted Real Madrid with a 'substantial offer' for the former Old Trafford idol.

That has prompted United to speak with Ronaldo's agent in a bid to see off a potential move to the French capital and get the 28-year-old back.

United - who sold Ron to Real for £80million in 2009 - are willing to offer £65m plus a player - most likely Nani - if they get the green light from Ronaldo's people that the player wants a move.

But they have now been panicked by PSG's move. A United source said: "United are not happy now PSG have made their move with a substantial offer.

"They will not give up, however, and have told Ronaldo's agent of their intent."

The Qatari backed big spenders from France are understood to have offered Real £80m.

They would also top any wage offer by United who would make him joint top earner at Old Trafford with Wayne Rooney on £250,000 a week.

His main sponsors Nike would also offer the player further incentives to move back to United.

 Can United deliver Ronaldo a shock return? Or will PSG's money be too much? Give us your shout below...