Celtic collapsed in a 2-1 loss at the hands of the new boys of Premiership Hearts to leave them behind in the title race after just 90 minutes.
The Australian watched right-back Anthony Ralston score a superb solo equalizer to cancel Gary Mackay-Steven’s opener, but watched in horror as John Souttar was given a free header to snatch a sensational victory for the Jambos.
And he admitted that his forwards – Odsonne Edouard in particular had another quiet night – MUST take more advantage of the opportunities Celtic creates if they are to come out of the early-season crisis that threatens to derail the opening weeks of the season. their campaign.
Postecoglou said: “We just don’t get the rewards for our game and when that happens you keep the opposition in the game.
“We go into so many good crossover areas and the crosses ended up off the sideline, so for me that’s probably the area we need to improve the most.
“At some point, it’s up to these players to seize the opportunities that we offer them. At the moment, we don’t.
“Defensively it’s not like we’ve been under pressure for periods of time in one of the games, but when you keep the opposition in the game there’s always a possibility of set pieces or counterattacks. “
The Parkhead chief is adamant that the rebuilding work is no more important than he thought and believes he will be successful when he has new signings at the gate – revealing he hopes to have some two more signed by the end of the week.
He added: “It was pretty obvious at the end of last year that the club was going through a big change.
“A lot of players had left before I got the job, I knew that and I thought it was an opportunity because I could bring in the players I wanted to play the kind of football I wanted.
“We didn’t do it as quickly as I hoped, it’s nobody’s fault. We’re working hard to get the deals, it’s just a tough deal by the minute. It just delays the process of establishing the principles I want.
“I hope that over the next week we bring in at least one more couple. We need players and we are working hard to bring them in.
Celtic gave defender Carl Starfelt his debut and threw Japan international Kyogo Furuhashi late in the game and the boss insisted they would get up to speed quickly.
“Carl was fine. He literally had a training session with us yesterday, ”he said.
“I threw it out because the two young center-backs played 120 minutes on Wednesday night. I felt we needed some fresh legs tonight at Carl and Niro.
“Carl only had one session so it was always going to be a big challenge for him. I thought he grew up in the game, but he will get better once he has a few weeks to train under his belt.
Celtic captain Callum McGregor has said her team must continue to believe in her, despite the disappointment with the results at the start of the season.
He said: “A lot of new players are coming together and we need to reduce this break-in period as much as possible.
“It’s important not to lower your head, not to slip into your shell and start to panic a bit.
“We know where we want to go and it takes hard work, focus and courage. “