Borussia Dortmund are interested in signing Ian Maatsen from Chelsea this month, sources have told ESPN.
The 21-year-old has started just one Premier League game this season and sources have said Chelsea are open to allowing him to leave in the January transfer window if a suitable offer arises.
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The Premier League side are willing to let Maatsen leave on a permanent basis but reports in Germany suggest Dortmund prefer an initial loan move.
Maatsen spent last season on loan at Burnley and Chelsea agreed a deal to send him back to the newly promoted Premier League side only for the Dutchman to reject the move.
Maatsen is primarily a left-back but his game-time under Mauricio Pochettino has largely come further forward in an attacking role. He has made 15 appearances in total, with 12 of them coming as a substitute.
Dortmund are also pushing ahead with plans to re-sign Jadon Sancho on a loan deal from Manchester United.