CELTIC are reportedly close to making their second summer signing.
It is reported that the Hoops are closing in on Argentine left-back Alexandro Bernabei.
Football Scotland say that the Hoops have scouted the Lanus defender for a while.
They also say that Postecoglou would like to have competition for Greg Taylor at left-back.
The 21-year-old featured 24 times for Lanus last season.
The report states that Bernabei will become Celtic's second signing of the summer.
Cameron Carter-Vickers was announced as a permanent Celtic player on Friday, following an agreement struck with Tottenham after his initial year's loan.