Klopp and Five other coaches who think Barcelona captain Leo Messi is the best player of this modern generation.

Sir Alex Ferguson: "Lionel Messi could play in the 1950s and the present day, as could Di Stefano, Pele, Maradona, Cruyff - because they are all great players. Lionel Messi, without question, comes into that category."

Jurgen Klopp: "For me Messi, but I couldn't admire Ronaldo more than I do already.

"Messi has much lower physical requirements from birth on. If you could paint yourself a perfect player, it would have Ronaldo's height, he could jump and run as high or quick as Ronaldo can do.

And what is then even added to that is his total attitude, it is absolutely perfect and professional, it couldn't be any better.

"And on the other side there is the small Messi who makes everything look so simple. And therefore I like him maybe a little bit more as a player on the pitch."

Jose Mourinho: “I played against Messi with Chelsea, Inter, Real Madrid. With different teams, with different approaches, with different goals.

“[...] It is also marvellous because it forces us to think, it forces us to study, it forces us to analyse, it forces us to decide, and it makes us better coaches."

Pep Guardiola: "I have been asked about 20 players and whether they are at Messi's level. Twenty. Benzema is just one more on the list," Marca quote the Manchester City coach saying."

Diego Simeone: "Diego [Maradona] filled us with emotions. But between the cracks, without doubt, Messi is better than Maradona."