During the first season of European football at Hoffenheim after we lost the Champions League knockout game to Liverpool, I changed a lot of players between Bundesliga matches and the Europa League for fresh legs. I learnt that we needed more stability. You need to keep five or six of the same places to give you structure, to be your spine.
My aims have always been to win titles and cups, to qualify for European football and to play in the Europa League or the Champions League.
I cried after the game when we won the league - it was hugely special to me. The first season we came second and got to the Champions League semifinal, and I knew I needed to come back and win with Chelsea.
The thing about Champions League football is it can turn on an instant. You can have a very good, solid team over the course of the season, but the Champions League is more like the World Cup, where your fate can be decided in a second and you need a bit of luck too.
I want to be remembered for the good things - for winning the Champions League, for winning five of the first six trophies at Barcelona. I could win another Champions League and I want to go on making history. It goes back to the feeling of more responsibility at Liverpool. I felt I had to suffer more to not be criticised but here the responsibility falls on others too and I can enjoy it more.
A club like Liverpool has to be involved in Europe, whether it is the Europa League or Champions League.
Tottenham set a points and victories record in my first season, missed out on the Champions League by one point and had a great run in the Europa League. In the second season, at the time I left we had more points than in the previous campaign.
I am not someone who watches every game from the Bundesliga, the Spanish League, or even the Premier League. Of course, if there is a good game, like in the Champions League, I will watch it.
You're going to watch football all your life - you're going to watch the Champions League and the Europa League - and I don't have a great feeling when I watch the Europa League, but when I watch the Champions League, I have a great feeling.
Give me a great Champions League game or an exciting Premier League game ahead of an international match and I'd love that to reverse. A lot of people have lost interest in England games, it is quite hard to watch.
I think for every young player of my age, they have to go out on loan. I know there's an U21 league and the Europa League for the youth teams, but it's not the same as playing men's football, when there's a lot more riding on it.
I even got game time in some Europa League matches, some other Premier League matches and managed to make a start in an FA Cup match as well.
I've been in the position where Liverpool needed to win on the last day to reach the Champions League. In May 2000, we needed to beat Bradford, who were fighting to avoid relegation, at Valley Parade but lost an awful game 1-0.
Being involved with the first team, be it in the Premier League or the Europa League, you just have to take it as it comes. You keep all the nerves inside and just play your normal game.
The mind tells you that you should use the Europa League as your pre-season but you don't really because the players aren't silly, they know it's a real game.
It's clear that anyone who plays in Belgium or another league with less quality still has a chance of making the Champions League or the Europa League.
Real Madrid have that special connection with Europe and Champions League matches. The fans transmit the importance to us and when you play a Champions League game, you get goosebumps, there is no better feeling in the world than that.