The Red Devils are experiencing difficulties in getting the Dutch winger to renew his deal, which expires at the end of the season.
The 19-year-old is not happy with the lack of first team opportunities he has received this season.
Metro says United are set to talk with Chong's representatives.
The club knows they are facing a tough battle to convince him to stay.
But they are confident he will renew.
The club feels that Chong is progressing in the right vein, but may need more experience before he is ready for a regular place in the first team squad.