My father went to catch wild frogs. I was skinny and weak, and my father heard their juice would give me size and strength. It tasted very, very bad... but I had to drink it because I wanted to be a footballer, and everyone said I needed to be bigger and stronger.

The best coaches have strong charisma to motivate the whole team while managing the relationship with the media, which can be tense.

In Korea, if a player doesn't play well, you would never criticise him, but in European countries fans criticise their own teams; sometimes they boo them off the pitch.

Always the Premier League has several clubs fighting for the title.

As Europe is more advanced in football administration, I would like to learn more there.

Throughout Manchester United's history, we always come up with answers to problems. Big stars come and go, but still, the team keep producing the same performances.

It's quite difficult to explain, but I really enjoyed playing against Arsenal, and I'm really pleased that we had great results against them during my career.

I don't like rehabilitating myself. It is one of the things I dislike.

I want to show the world how good Korean players are by playing well in the top flight.