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.

I want players who are always striving to improve.

I like to be able to control which players I'm working with. Because it doesn't matter how good a coach you are if the guys you're working with think they already know it all. You need a response, you need to feel they're trying. I want players who are always striving to improve.

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

We, as a nation, have always worshipped cricket and cricket players, and even football. But kabaddi and kushti are seen fit only for villagers. That's changing now.

If you're a basketball player and you don't stop and take pictures with your fans, you can have an amazing game and everyone still loves you.

My father was a very fun dad. He was always coaching our soccer sports teams; he made sure that we had activities to do. He was kind of goofy and fun. But at the same time, he had a lot of lessons to teach us so that we didn't grow up and just not be good people.

If I look what sport has done in my life, I don't think there's any doubt that sport can change lives.