It was another frustrating day at the office for Celtic as they slumped to six points behind rivals Rangers after failing to beat Dundee United at Parkhead.

Liel Abada had given the Hoops an early lead but it was quickly cancelled out by a wonderful Ian Harkes header.

Ange Postecoglou 's team hit the woodwork no less than three times but they lacked a cutting edge and it's already the fourth time they've dropped points in the Premiership this season.

They sit in sixth place at the seven-game mark and have plenty of work to do to claw back Steven Gerrard 's team - or any of the other early high-flyers for that matter.

The Australian boss focused his post-match interview on protecting his players but a few eyebrows were raised when he said he wanted to "take the responsibility away" from his stars.

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And that was the primary focus of the post-match chat as John Hartson, Stiliyan Petrov and Pat Bonner all weighed in.

John Hartson

"Ange has just said there 'I'll take the responsibility away from the players.'

"What does that mean? Has he picked the wrong team? Does he mean the players aren't good enough?

"It's a difficult one and let's not forget this is coming off the back of one of Celtic's worst performances in many years against Livingston last week.

"Celtic have to respond and Ange will have wanted to see a reaction.

"The endeavour was there and on another day we might have won.

"But at the end of the day we haven't kept a clean sheet and we haven't been ruthless enough."

Stiliyan Petrov

"It was interesting what Postecoglou said about taking the responsibility away from the players.

"As a player, you don't want that. You want the responsibility, you want to play in front of 60,000 and do everything to win.

"The players did try. They created chances, they were on the front foot. It was a good performance, but they couldn't convert the chances.

"Dundee United were narrow and very well organised. There was no space between the lines.

"They were comfortable with how Celtic were playing.

"Celtic haven't offered anything different. If I was Turnbull or Rogic, I would be demanding the ball to get Ajeti into the game."

Pat Bonner

Former Celtic goalkeeper Pat Bonner
Former Celtic goalkeeper Pat Bonner

"The spark is missing at the moment and now the pressure is on.

"They're six points behind Rangers. Even though you've got a lot of injuries and mitigating circumstances, you've got to hang in and get results.

"It just didn't happen. They got off to a good start and you'd expect them to win after scoring early.

"But they struggled. They had very little on the bench to come on and change the game."