Lille president Michel Seydoux thinks Eden Hazard will one day replace Lionel Messi at Barcelona - so who could do the same with Cristiano Ronaldo at Real Madrid?

Ever since that early September evening when the Portuguese star declared his unhappiness, rumours have circulated that the Real Madrid superstar could quit the Bernabeu.

So, should the 27-year-old decide to wave Jose Mourinho goodbye, who could replace him as Madrid's next number seven.

Radamel Falcao - Atletico Madrid

Outside of Messi and Ronaldo, Falcao is the world's premier striker. The Colombian striker has a goals record to rival the Barcelona-Madrid pair, and was been linked with a move away from Atletico this summer.

A cross-city move to rivals Real would be controversial, but the La Liga frontman would likely be Madrid's first choice should Ronaldo depart.

A lethal finisher, the 26-year-old demonstrated to Premier League fans just how dangerous he is with a fantastic hat-trick against Chelsea in the Super Cup final. It's only a matter of time before he leaves for a bigger club - why not Real Madrid?

Sergio Aguero - Manchester City

The Argentinian striker recently revealed he would have loved to have joined Madrid, but opted for Manchester City when no offer was forthcoming from the La Liga club.

A stocky, skilful forward, Aguero possesses the talent to replace Ronaldo's goals, and at just 24-years-old, is the right age.

But Manchester City have no reason to sell - money is not an issue at the Etihad Stadium - making a move for Aguero unlikely.

Neymar - Santos

The hottest property in world football right now is undoubtedly Neymar. The Brazil star has been anointed the world's best player - by Pele no less - and is just 20-years-old.

Reportedly committed to staying with Santos until after the 2014 World Cup, Madrid would likely pay whatever it takes to bring Neymar to the Bernabeu should they lose Ronaldo. PSG were recently linked with a £85m move for the Santos forward, a figure which would smash Crisitiano's own world transfer record.

The most likely Cristiano Ronaldo replacement.

Wayne Rooney - Manchester United

Could Rooney follow Ronaldo and David Beckham's path from Old Trafford to Bernabeu?

At his best Rooney is a world-class centre-forward, and has the star-quality to sell the shirts. He's fallen out with Sir Alex Ferguson once, not many players get a second chance, and there's few clubs Rooney would likely consider should he decide to leave Manchester.

Real Madrid would be one of those few.

Edinson Cavani - Napoli

An outside bet, especially after the Uruguayan signed a new long-term deal with his Serie A employers, but Madrid could look to Cavani to replace Ronaldo's goals.

The 25-year-old has hit the back of the net 51 times in 71 Serie A appearances in two and a bit years in Italy, and has been strongly linked with a move to Chelsea in the past.

Other contenders

Another unlikely move, but Fernando Torres to Real Madrid could work. If the Spaniard's troubles at Chelsea continue, a move back to Madrid could be just what's required to kickstart his career.

Having begun life at Atletico, it would be an awkward move, but should Chelsea choose to cut their losses, Torres still has the name to command a move to one of Europe's elite clubs.

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#Football
#Manchester City
#Chelsea
#Fernando Torres
#Manchester United
#Cristiano Ronaldo
#Wayne Rooney