In Europe, I always say that Barcelona and Real Madrid are the ones to look out for.
All of Europe's biggest clubs place the Champions' League as their top priority these days but only one of us can lift the trophy. The domestic league titles are still crucial of course, but I think most players will tell you the Champions' League is the one they want to win most of all.
I pray Cardiff get back to the Premier League. If I sell Cardiff, I will buy another club in the U.K. I have a club in Sarajevo. The fans are fantastic. The people who run the club are incredible. They really motivate me. I'm looking at another club in Europe and then the MLS.
For me, Real Madrid are just like any other club, like Barcelona, Milan, Bayern Munich, or Inter. Just another big club.
Louis van Gaal is one of the most incredible coaches who's done a fantastic job in clubs all over Europe.
PSG are amongst the top eight European clubs. They want to go to the next level in the Champions' League; it is a very big club that would attract any player.
If you want to maintain the unique character of our sport in Europe, which is of great importance to millions of people, you need to be able to put associations in a position to protect the weaker clubs.
I have played for Ajax, Liverpool and Besiktas in Turkey - all massive clubs in Europe.
When you get to 16 at Barcelona, it's the age that you sign your main contract. I was about to sign that, but we knew there were a lot of other options because you always get them from other teams at that time. I didn't have the option to come to Arsenal until I was right about to sign with Barcelona.
Bayern is one of the best teams in the world - on a par with Real Madrid and Barcelona. A move to Barca or Real wouldn't have been a step up for me.
I had the chance to go to Sevilla, Inter and Porto.
I'd like not only to test myself against Barcelona, but top teams from the other leagues.
I don't think in the big clubs in Europe you can find three strikers with an average age of 20.
The best players want to play for the best clubs in Europe and appear in top competitions like the Champions League.
Lyon is a big club, but not one of the five best in Europe.
If young players are capable of playing 90 minutes every week at European clubs why prevent them from doing that?
I want to move to one of Europe's best clubs if I leave Rotterdam, just like Robin van Persie and Kuyt did before.
It certainly is dangerous that there are only a few clubs left in Europe that can afford to pay millions. At the end of the day however, the spectators decide the rates of pay - by watching the games and consuming the goods and services advertised on sports TV programmes.
If you're a talented player, and you're 20 years old, you should be playing in the UEFA Champions League or in the elite European teams like AC Milan, Juventus, or Chelsea.
I like the Italian giants, and Spain is attractive, but when I heard that Manchester United were in the frame, I was very flattered. Nonetheless, I want to reiterate that Udinese is a great place, and I am happy here.
You can't compare Barcelona and Bayern Munich to Manchester City.
