Arsenal are one of a number of Premier League clubs interested in Freiburg defender Caglar Soyuncu, Sky Sports News understands.
The 22-year-old centre back has made 55 appearances for Freiburg since joining in 2016 and has been capped 15 times by Turkey.
Soyuncu’s agent, Mustafa Dogru, said: “Sven Mislintat (Arsenal head of recruitment) has been keen on Caglar since he was at Borussia Dortmund.
“There are concrete talks – all that remains is for a fee to be agreed.”
Arsenal have already bolstered their defensive ranks with the addition of right-back Stephan Lichtsteiner from Juventus on a free transfer.
Arsenal are in talks with Sampdoria for midfielder Lucas Torreira and an agreement is close, according to Sky Italy.