Beşiktaş is interested in Brentford's Norwegian centre-back, Kristoffer Ajer, as part of a plan to overhaul their defence. It is reported that the management is considering a loan deal with a purchase option, but it is understood that Brentford may demand a mandatory purchase clause. Ajer's contract with the Premier League club is valid until 2028, and this season he has made 15 appearances in the Premier League.