​Celtic boss Martin O’Neill: “I think these games show you that we have obviously a lot of work to do in that aspect [squad depth].”These games are real, real tests for you and unfortunately we’ve failed that test tonight.”I’m responsible for this one but I don’t know what’s happened in the past.”Without a doubt. Naturally it took me a long time to get over the UEFA Cup final in 2003 but this was majorly disappointing. In the context of things, one was a final which it would have been terrific to win, this was a qualifying game which we should have been able to get through.”We know that we are a million miles from the finished article. That’s absolutely true. I think we thought that anyway.”The qualification for the champions league is major, it’s major in every aspect. Financially, for prestige, but we have to pick ourselves up. That’s my responsibility again to do that.”I think I said last week that if you could qualify for the champions league there would be players wanting to come on that basis. That’s not going to be the case but we’ll see. Tonight we came up well and truly short, particularly in the second half.”