Eurosport - Sun, 25 Jul 18:41:00 2010
The Netherlands playmaker, 27, is not automatic first-choice at the Bernabeu and has been linked with a move away from Madrid.
And he told the Daily Star Sunday that he would be unable to play for another Spanish club, stating a preference for the Premier League big-guns.
"I have heard of the interest from Liverpool and Chelsea - and that is very flattering," he said. "If either of them were willing to offer me first-team football, to be honest it would be very hard for me to not listen to what they had to say.
"I think I have the relationship with Madrid where they understand my position and would let me hold talks.
"I expect the majority of transfers to be concluded in the next two weeks, and if Chelsea or Liverpool wanted to talk with me I would at the very least listen to what they have to say.
"They are both giants, and if they could offer first-team football it may prove impossible to turn down."
The former Ajax and Hamburg midfielder said he was happy at Madrid, but insisted that first-team football remained his priority and that, if it was not forthcoming, he would leave La Liga.
"Real Madrid is the most prestigious club in the world and I am happy here and also in Spain, but I am at the age where I have to be playing first-team football," he explained.
"The boss knows how much he plans to use me, and if he is willing to listen to offers for me.
"I wouldn't be willing to play for any clubs in Spain out of respect for Madrid, so in my eyes the only other place to go would be the Premier League.
"It's the only league that competes with the standard of La Liga."