The Primera Division has become something of a two-horse race in recent years, with Valencia the last side to lift La Liga title outside the two Spanish heavyweights in 2004.
Since then, Barcelona has triumphed on five occasions and reigning champion Real has won three times.
And such is the quality amongst their ranks, Real's all-time leading goalscorer Raul believes they would be a match for anyone.
"The problem lies not in the league," Raul told Doha Stadium Plus. "Manchester United are a great team in
"It is normal then the other teams are struggling to keep up with them.
"If Real Madrid and Barcelona played in
"At the moment Real Madrid and Barcelona are the best. The gap could be reduced in coming years."
The 34-year-old, who left Real for Schalke 04 in 2010 after scoring 228 goals with the Bernabeu outfit, is now with