-LRB- CNN -RRB- -- Should he stay or should he go ? Manchester United insist Cristiano Ronaldo will still be wearing a red shirt next season but the Portuguese winger , courted by Real Madrid , has refused to rule out a move to Spain . Cristiano Ronaldo has refused to commit himself to Manchester United . Football Fan Zone presents five reasons why Cristiano Ronaldo should stay at Manchester United and five reasons why he should move to Real Madrid . Let us know what you think below . Stay : Loyalty : Manchester United took a huge risk when they signed Ronaldo as an unproven 18-year-old for what seemed a vast sum of $ 25 million in 2003 . Since then , under the tutelage of Alex Ferguson and Carlos Queiroz , Ronaldo has developed from a raw talent more famous for his stepovers into the most effective and consistent player on the planet . United also stood by Ronaldo when he was widely blamed in England for getting his club mate Wayne Rooney sent off during the 2006 World Cup . At 23 , Ronaldo owes his best years to United , the club that has helped him fulfil that potential . He has almost four years left on a contract worth $ 240,000 a week -- making him United 's best paid player -- and he should honor it . Glory : Having dominated the English Premier League for the past two seasons and won last season 's Champions League , Manchester United are a club in the ascendancy . With a young team boasting the attacking talents of Ronaldo and Rooney , outstanding young prospects such as Anderson and Nani and a solid defense built around Rio Ferdinand and Nemanja Vidic , United could be the preeminent force in European football for seasons to come . If football is primarily about winning trophies , rather than money or lifestyle , then Ronaldo should stay where he is . The Premier League : The English Premier League is the most watched football tournament on the planet and increasingly the stage on which the world 's best players want to showcase their talents . It was no coincidence that three of last season 's four Champions League semifinalists came from the EPL . This week the current world footballer of the year , Kaka , has been linked with a big money move to Chelsea . Real Madrid may be the Spanish champions and one of the world 's most famous clubs , but United are currently the biggest club in the biggest league in the world . Continuity : Leaving a club is always a risk and there is no guarantee that a player will settle successfully into a new set-up in a different country , as Thierry Henry has discovered at Barcelona . At Old Trafford , Ronaldo is the undisputed star with a system built around him and teammates working for him . At Real Madrid he would be one ego among many . Real 's Dutch midfielder Wesley Sneijder has already warned that Ronaldo 's arrival on a massively inflated salary would not be welcomed by other squad members : `` It would be bad for the dressing room if he gets a much higher salary than the rest of the squad . It 's not important to me but I know other teammates would not like that at all . '' Injury : Having been carrying an ankle injury since March , Ronaldo finally went under the knife earlier this month and is expected to be sidelined until at least October -- long after the summer transfer window has closed . Ronaldo should be concentrating on getting back to full fitness as quickly as possible rather than worrying about a possible transfer . A move to a new club would also likely put him under more pressure to play before he has made a full recovery . Go : A fresh challenge : Ronaldo has achieved everything he can in English football after two near perfect seasons at Old Trafford , winning back-to-back English Premier League titles and player of the year awards and a European Champions League winner 's medal . If the 23-year-old is to continue developing he needs to find new challenges ; what bigger challenge than joining Real Madrid -- the club of the `` Galacticos '' -- for a world record transfer fee ? Carlos Queiroz : The former United assistant manager was a big influence on Ronaldo 's career and an important mentor figure . With Queiroz departing to coach the Portuguese national side , will Old Trafford hold the same appeal for his protege ? Ronaldo has said he is prepared to `` upset '' Alex Ferguson and admits he has not spoken to the United manager in weeks while apparently taking advice from former national team coach Luis Felipe Scolari -- now managing United 's biggest rivals Chelsea . Money : Real Madrid are apparently prepared to make Ronaldo the most expensive and best paid player in the world . A transfer fee of around $ 140 million would smash the $ 92 million Real paid for Zinedine Zidane in 2001 . On top of that , Ronaldo could command wages of up to $ 400,000 a week . By comparison , United have said they are not prepared to renegotiate Ronaldo 's current deal worth $ 240,000 a week . In an industry driven by money , Ronaldo should go where he can command the highest wages . Lifestyle : It 's a long way from the sun-drenched beaches of Ronaldo 's home island of Maderia to the dreary gray skies of the northwest of England . Madrid may not have any beaches either but at least the weather and the food are more familar and it 's a lot closer to home . As a city , Madrid is far better suited to Ronaldo 's southern European temperament than Manchester . Real Madrid : Manchester United may be big but Real Madrid are in a league all of their own . With nine European Cups and 31 Spanish titles to their name , Madrid 's achievements are unrivalled . Having written himself into Manchester United folklore , Ronaldo has the opportunity to do the same on the Bernabeu pitch once graced by the likes of Francisco Gento , Alfredo di Stefano and Fernec Puskas . Ronaldo may already have done enough to win this year 's world footballer of the year award but a move to Madrid would likely seal that honor : in recent years Luis Figo , Zinedine Zidane , Brazilian striker Ronaldo and Fabio Cannavaro have all won the honor while wearing the most famous white shirt in sport .