The Glasgow giants have tasked Ange Postecoglou with taking Celtic back to the top after arch-rivals Rangers claimed the Scottish Premiership title last season.
Celtic backed their new boss by signing a host of new players during the recently concluded transfer window in the shape of stars like Georgios Giakoumakis, Joe Hart, Kyogo Furuhashi and Carl Starfelt.
However, Wilson is disappointed with Celtic’s transfer business and feels the lack of activity earlier in the summer has caught up with them after the side lost three of their six league games.
The ex-Celtic star pointed out how the Hoops are still citing lack of fitness and pre-season as reasons behind players being unavailable and stressed the need for the club to be better prepared.
Wilson explained that he does not blame Postecoglou for the lack of transfer business early in the summer, but insisted that the mess behind the scenes at the club is coming home to roost.
“The lack of activity in the summer months is what is catching up with Celtic now“, Wilson said on Cylde 1’s Superscoreboard.
“I know that they made those signings, but they came late in the door.
“There were Champions League qualifiers, there were Europa League qualifiers, the week it started and people were still finding their way coming into the club.
“Celtic have to be better prepared, I think they all knew it was going to be a tough job for any manager, coming in and turning around the squad and bringing a host of new players in.
“But, the amount of time it has taken has now, as I said, caught up with them.
“Six games into the league season, we’re still talking about people [having] lack of fitness and pre-season, they are behind them, they are still catching up.
“You need to be better prepared going into a league season that has got so much at stake at the end – an automatic Champions League place and the money that comes with that.
“I don’t necessarily blame Ange Postecoglou for that because there was an awful lot he had to do, but the mess behind the scenes at Celtic Park is coming home to roost at the minute.“
Celtic currently sit sixth in the Scottish Premiership table with nine points, having won three and lost three of their six matches so far.