Young defender Kosta Nedeljkovic is still not back in full training with Red Star Belgrade.
That is said to be at the request of Aston Villa, who are signing the defender in the summer.
He has already put pen to paper on his deal, but stayed at Red Star until the season ends.
Per European media reports, Villa are constantly in contact with Red Star.
They want to ensure Nedeljkovic is not aggravating any problems and that he is looked after.
He must only conduct light, individual training until he is passed 100 percent fit by the doctors.