Wolves have rejected a request from Cardiff City to take defender Dion Sanderson on loan.
The 21-year-old is currently on loan with Sunderland in League One and Cardiff made an approach to see if Wolves would cut short that deal and allow him to move to Wales.
However, they turned that proposal down and Cardiff are now talking to Crewe about a deal for Perry Ng.
An Initial offer of £250,000 was rejected but talks are ongoing while Cardiff have also had a bid accepted for Bournemouth defender Jack Simpson.