The atmosphere generated by the fans in Celtic's stadium for our visit was the most impressive I've ever witnessed. The grounds of Liverpool and Manchester United are good and the hostile feeling of playing against Real Madrid in the Bernabeu is also excellent, but the atmosphere against Celtic was the best.

To me Paul is a role model. He is the best midfielder I've seen in the last 15 or 20 years.

The way I see it, Messi is the best player in history. He is the one who changes the course of games; he's the best. There is no comparison in my view; he's the world number one and by a margin.

Leo [Messi] is the best player of all time - better than Pele, Maradona or Cruyff. There have been some great teams in history - Pele's Brazil, Cruyff's Ajax, Sacchi's Milan - but in the past 20 years this Barcelona team is the best.

In the last 15 to 20 years the best central midfielder that I have seen — the most complete — is Scholes. I have spoken with Xabi Alonso about this many times. Scholes is a spectacular player who has everything. He can play the final pass, he can score, he is strong, he never gets knocked off the ball and he doesn’t give possession away. If he had been Spanish then maybe he would have been valued more.

Iniesta is easily Spain's most complete player. He has everything.

If he continues like this then I think Messi will be the best player in the history of football.