Real Madrid coach Carlo Ancelotti announced Arda Guler's recovery from the injury he suffered since joining the monarchy and made him not participate in any official match with the "Merengue" so far.
Guler joined the club last summer from Fenerbahçe for 20 million euros after a fierce rivalry with Barcelona.
But the 18-year-old suffered great misfortune after undergoing surgery following an injury, and then suffered a setback that has so far sidelined him from the pitch.
Ancelotti before the Rayo Vallecano match spread the news of Gunler's recovery, saying: "He trains with the group, and he definitely needs to play games."
"Arda will be called up for tomorrow's match, we will develop a certain plan in order to improve his physical condition."
Real Madrid lead the La Liga standings with 28 points, level with Girona, but a tough task awaits them against Rayo, who are eighth and have a very good start to the season under Colombian star Radmil Falcao.