Mesut and I played together at Werder Bremen and Arsenal for so many years. There is no other player that I shared so much time with. We were important for each other.
It is not only the skilful players who can make the difference in a game. It is as well players who just try to stick to their qualities and give absolutely everything.
I want to make an impact on young people's lives and be part of their future no matter what they do because I have seen that all the very talented players at 15, 16 still had very little chance to be successful in football.
Some days you realise that everything is a burden, both physically and mentally. That it's not about fun, but you have to deliver without a doubt. Even if you are injured.
Obviously, everyone looks at whether we bring young footballers into the first team, that's one of the goals. But I wouldn't discard someone who is successful in life, that's big. The hall of fame in the academy should be a wide variety of stories.
When I played for Hannover I had several offers, also - as I have been told - from Hamburg, Bremen and Bayern. Back then I already was a German international and Bayern would have loved to have the complete German national team.
Everyone says I should really savour the last year, play as much as possible, really soak everything in. I'd most like to sit on the bench, or, even better, in the stands.
I want players to think: 'OK, this has happened now, what is next for me?' That's a very big target because what are academies about nowadays? Is it really just to find one or two players? But what happened to the others? I'm very, very interested in that.
If there is a really good player at U16 level who disrespects the coach, if you then say: 'You can go somewhere else then. That is not how we do things here.' That would be powerful.
Being in a career and going from highlight to highlight and playing a lot of matches you go through it and think it's normal when you play in front of 60,000 and you almost want to vomit in front of every game.
The heritage of Arsenal, to believe in our academy and to really promote our academy. That's important and that's why I am here as well. I wouldn't waste my time just to know that we are not having successes here at Arsenal.
If Messi has the ball, he is fantastic to watch and difficult to stop. You have to double up on him, triple up on him even, stay with him constantly to block his way to the goal.
Never tackle, never go down, we've heard it over and over again. You have to try to keep Messi away from the goal and block him with multiple players while being as close to him as possible. He is too quick, too fast, too intense with the ball.
I was fortunate to play under Thomas Schaaf at Bremen. And I played for Arsene Wenger. So I always felt, let's say, more responsible than others towards the manager and his succession.
Arsene Wenger was always the kind of manager whose belief in his team's qualities was steady as a rock and who approached matters with never-ending patience.
You never stop working, you never stop doing things because there's someone behind you - in a respectful way - who is giving absolutely everything in every single training session.
If you just protect and you have no chances on the break and you miss one chance to kill the game, then it's difficult in the Premier League to win any game.
The amount of staff we have in academies is... I've never seen anything like it. It's good to take care of the players but sometimes I get confused by the number of people who have an impact on one kid - we're talking 100 people or more. It's quite a heavy load.
When I was young and visited England with my auntie, as somebody who was football crazy, I simply had to come back with a shirt. I can't remember why, but I came back with an Arsenal shirt and my brother had a Manchester United one.