He said: “It will always ultimately be about players and how you cope with pressure. What you try to do, especially in this short period of time, is give them strategies in order to cope and try to put them in pressure situations and match situations.
“We train at a real intensity, so the situations we do are all real-game exercises. But, of course, you try to limit the mistakes and, hopefully, they can take that into the game.
“It is a wee bit of both. You can train it and develop it, but it’s about the players. And players who constantly make mistakes … I haven’t got a magic wand.
“I think mental strength is part of playing for a club like Celtic. You don’t always have to be the best player, but you’ve got to cope with pressure and cope with that demand, whether you are a player or the manager.
“You are at one of the big institutions and you have to be able to deal with it. And that’s not always about the talent.
‘At a club like Celtic you can have big talents who maybe can’t cope with pressure. So, the idea is to get the personality type, the profile right, so that in those moments they can stay calm and deal with it.
“I know it will come, no matter how much you dominate a game. There will be moments when the pressure will come. You just stay calm, stay focused, and we try to train for that.”
“I am already looking ahead and looking forward. I know what happened, I know goals were conceded, blah-blah-blah, but my job is to look forward with real positivity.
“I can only vouch for what I’ve seen and so far it’s been absolutely first class. We still have a long way to go, a long way to go in the pre-season, and we have these games to try and qualify, but I am a great believer in looking forward.
“You can over-analyse things. The bottom line is, it happened. They went on to win the title, which was great and now we’ve got to roll it out and go forward.
“The players I had at Liverpool coped really well with it. When I went to Liverpool the club was eighth. It seems a million miles away from the Champions League, but in two seasons we were able to go on and finish runners-up and get into the Champions League. So, they coped with that element very well.
“But there’s no doubt that, at the big clubs, dealing with pressure is important – and it’s about giving them the strategies to cope with that and you become a better player.”