Aston Villa have agreed a deal with Chelsea for left-back Ian Maatsen.
The fee for the 22-year-old is understood to be worth £37m, more than his £35m release clause.
Personal terms are not expected to be an issue.
Borussia Dortmund were keen on signing Maatsen on a permanent deal after his successful loan spell at the Bundesliga club last season.
He made 16 Bundesliga appearances for Dortmund, scoring two goals, and featured seven times for the German club in the Champions League, finding the net once.
However, as it stands, last season's Champions League runners-up are unable to meet the release clause in Maatsen's contract.
More to follow...
When does the summer transfer window open and close?
The 2024 summer transfer window in the Premier League and Scottish Premiership is officially open.
The window will close on August 30 at 11pm UK time in England and at 11.30pm in Scotland.
The Premier League and Scottish Premiership brought forward Deadline Day to link up with the other major leagues in Europe. The closing dates were set following discussions with the leagues in England, Germany, Italy, Spain and France.