Both Real Madrid and Barcelona are believed to have scouted him and Moses' agent Tony Finningan is quoted in Spanish newspaper AS as saying: "There is interest from Madrid, which we were made aware of by intermediaries a few weeks ago.
"But I have not received a call from them. Palace want to sell before the transfer window closes on Monday, so we won't have to wait much longer.
"But it is clear that the player would rather go to Real Madrid. I hope they call us soon."
However, sources in Spain say Madrid would be unwilling to bid more than £2million for Moses, which would not be acceptable to Palace.