It took me 35 years of being involved at a decent level of football to become manager at a great club like Celtic.

It wasn't an easy decision to leave out Bobo, because I could have done that with two or three from the back four. But there's a limit to the players you have and the changes you can make. The reality is we're not defending well enough. But we just have to plug on. There's no magic formula.

I'm a better coach now than when I joined Celtic. The longer you stay in any job, the better you become. If you lose your drive, your enthusiasm, your imagination, that experience is no good.

He [Sir Alex Ferguson] used to play tapes of Bill Shankly talking. I remember that and a singer he liked. I don't know who it was but it was crap. He played it on the team bus too, and all the boys hated it. Until one night it got chucked away. If he's still wondering who threw that tape off the bus, it was me. So maybe he was right and I'm not to be trusted.

It took me 35 years of being involved at a decent level of football to become manager at a great club like Celtic.

I've seen teams spend £150 million and get nowhere near the Champions League. It has taken Manchester City a billion to get there. There are no guarantees.

He could have done one of three things. He didn't do either.