Manchester United boss Jose Mourinho is tracking Real Madrid midfielder Casemiro.
Mourinho is in the market for holding midfielder to play alongside Paul Pogba and Okdiario says Casemiro is under consideration.
Mourinho worked with the Brazilian at Real and has been impressed by his progress over the last 12 months.
Real will fight to keep hold of Casemiro, however, having rejected two offers of €50 million for the midfielder.
The 24 year-old's current deal carries a €200 million buyout clause.