George Edmundson and handed in a transfer request at his club Oldham Athletic, according to the Daily Record.
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The centre-back is a transfer target of Rangers, who had a bid of around £400,000 knocked back earlier this week.
Edmundson was offered a new contract in order for Oldham to maximise the player's value, though he decided to turn it down.
The 21-year-old has just 12 months remaining on his deal and cash-strapped Oldham will be looking to sell him this summer before losing him for next to nothing next term.
Edmundson is said to be keen on the idea of a move to Ibrox, where he'll provide competition for places alongside Nikola Katic and Connor Goldson in the heart of the defence.