The potential return of World Player of the Year Cristiano Ronaldo to Manchester United is more likely than it has ever been, according to Sky Sports journalist Guillem Balague.

Ronaldo has reportedly been unhappy with Real Madrid's transfer policy and the possibility is growing that the Portuguese forward may push for a return to Old Trafford at the end of the season - six years after leaving the club for the current European champions Real.

That move cost Los Blancos an at the time world record fee of £80m, and any return could cost United a significant fee of their own despite the fact that the player will be 30 by next summer.

Balague said: "He's not happy that [Mesut] Ozil left and he's didn't like that [Xabi] Alonso and [Angel] Di Maria left.

"He has this idea that at Real Madrid he's doing a job, while he enjoyed himself 'like a kid' at Manchester United. He dreams of going back to Manchester United and Manchester United have all the finances in place to get him."

Meanwhile, United have been handed another boost in their pursuit of the player after it emerged that Paris Saint Germain could not contend in the race to sign the player - because of FFP restrictions.

French journalist Sylvie de Macedodismissed the reports, saying: "This rumour from Cristiano Ronaldo returns every year.

"To our knowledge, the PSG has not taken any steps to recruit him. How could he with the constraints of financial fair play?"

Chelsea have also been interested in signing the player, who reportedly wants £500,000-a-week in wages, but his preference is to return to his former club.