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.

I have a lot of good memories, especially the days when I have lifted trophies. They are great feelings. That is why Manchester United players want to lift trophies again and again.

Mentally, you have to be strong, particularly in away games at the places where the fans are very passionate.

If you have luck on your side and are strong mentally, you can succeed in Europe.

The AFC Asian Cup is the most important and biggest competition in Asia, and we should do our best to win it.

It doesn't matter how I'm asked to play, or if the football is good or bad: I like football when I'm on the pitch, not when I'm on the sidelines.

After Sir Alex Ferguson, it's been a difficult time for Man United, but actually, many people know that after Sir Alex Ferguson, it would be difficult for Man United.

It's not an easy game at Goodison Park - it's always difficult there.

Sometimes I miss playing football, but it's a past thing now.

To mark Pirlo was not easy.

Football can make things different, and football can make change around the world. I hope football can do something for Korea.

There is no question that Korean footballers have the ability to play in Europe. The real challenge is whether they will be able to adapt to western culture.

I don't want fame or to make money by appearing on TV, but I would not mind appearing on TV if it is related to what I am doing for football.

Once I became more famous, I was proud that people in Asia started to look towards me.

North Korea and South Korea speak the same language, and actually, we are the same country.

My reputation has increased, not just in Korea but across the continent.

Lee Chung-yong has been playing well and trying hard at Bolton and has grown in confidence. His improvement is valuable for the national team.

Although the Premier League is tough because players have good physiques and can switch swiftly in offense and defense, it can be overcome after adapting to the league for a few months.

I try to help the team to win, and my role is to run a lot and bring energy to the side. It's my job, so I have to do it.

I don't like to be famous.

To become a good coach, it is important to be equipped with tactics and strategy. But first of all, you need to have strong leadership.

Against Japan and any Asian teams, we've had good results, so I would say that history proves we are the best Asian team.

At Old Trafford, we are not afraid of anyone.

I have to stop rushing things. I have to be composed in my mind and slow things down. I think that will make me a better finisher.

Europe is leading the world in the sport of football. I want to utilize my experience from Europe to support the development of football in Asian countries.

I watched Hiddink and Ferguson at close quarters, and I realized that I am not a coach.

There is still a big gap between South America and Europe and Asia, and if we had more players playing in Europe, the gap would be smaller.

I thought the sports law sector would be boring, but it was unexpectedly interesting.

We have a long history with Japan. When South Korea play against Japan, the fans tell us that if we lose, they are going to throw the players into the sea.

I've had fans coming up to me and speaking Chinese or Japanese. It's not a case of mistaken nationality. I just don't think they realise that we don't all speak the same language.

It was funny because on the day that I joined the club, the newspaper that broke the news was one that people don't always trust or believe. Then, when I signed, and there were pictures of me and Sir Alex Ferguson, people believed it.

I just want to be good at soccer and have a normal life; it is a little ironic that you can't have both.

When I'm back in my country, it's like being David Beckham. But it's like that for David Beckham all over the world. It must be more difficult for him than for me.

Asian fans chase me and shout; it is different in England.

We always try to keep going and stay concentrated. Early goals help that a lot.

If it is possible I want to finish my career at Manchester United.

The happiest moment was when I just played with a ball as a boy, carefree, without worrying about anything.

They are always open to come to South Korea and play, because we never reject North Korean athletes.

There aren't many Asian players in Europe or the Premier League, so that's more attention for me.

When we had a good relationship between North Korea and South Korea, we always connected with sports.

Manchester United is the world's best club. There is no reason to move to any other team.

By training with some of the world's finest footballers and manager, I feel I have matured in all areas - mentally, physically, and technically.