The Hoops went into the summer expecting a lot of personnel changes after they lost their Scottish Premiership title to arch-rivals Rangers last term.
Australian tactician Postecoglou was appointed as the new manager and the club went on to make 12 signings during the recently concluded transfer window.
There were also major internal changes at the club, with Nick Hammond, who led Celtic’s recruitment team, departing in March and Dominic McKay replacing Peter Lawwell as the chief executive officer.
The departure of Hammond and the absence of a figure to coordinate transfers is said to have led to major confusion at Parkhead.
Despite the confusion, Celtic managed to bring in 12 new players, but only two of them were identified as targets by Postecoglou.
Japan international Furuhashi and Croatian full-back Juranovic were the only two of the 12 signings Postecoglou identified as players of interest.
In the absence of Hammond, CEO McKay, his predecessor Lawwell, major stakeholder Dermot Desmond and his son Ross, head of scouting Jay Lefevre and head of legal Michael Nicholson were all said to be in involved in Celtic’s transfers.