Glasgow - Celtic captain Scott Brown says he is ashamed by his side's performance after they crashed out of the Champions League following a 2-0 defeat to Malmo FF in the second leg of their play-off round clash.
The result at the Swedbank Stadion handed the Swedish champions a 4-3 aggregate win as they overturned Celtic's 3-2 advantage from the first leg.
The Hoops had found themselves 2-0 up after just 10 minutes of the first leg but Jo Inge Berget's crucial away goals helped set up a tense return in Sweden.
Malmo opened the scoring in the 23rd minute when Markus Rosenberg, suspended for the first leg, headed a corner past Craig Gordon before Dedryck Boyata's own goal in the 54th minute put Age Hareide's side through to the lucrative group stages of the Champions League for the second year running.
Hoops skipper Brown was severely critical of his side's abject display.
"I'm ashamed of our performance. The way we handled ourselves all over the park, the way we defended, the way we attacked - it's not like us at all," the Celtic captain said.
"We have to hold our hands up. We've got high expectations, which puts a lot of pressure on us, but we should have been a lot better than that. Our performance just wasn't there.
"We didn't look like we were going to score a goal and we looked like we were going to concede a few, so we need to work on it."
It is the second successive year Celtic have fallen at this hurdle and the Scottish champions must now be content with a place in the draw for the group stages of the Europa League.
"We got to the final hurdle and fell. We can't do that two years in a row," Brown added.
"We said we learned last year and we've not. We need to go away and have a big chat and learn from it.
"We will take everything on board and watch the game back and see where we've gone wrong.
"It's all about our personal pride and it's just been shattered."