Former Real Madrid GM Arrigo Sacchi feels Cristiano Ronaldo's development has stalled. Sacchi believes Ronaldo's improvement has slowed in comparison with his great rival Lionel Messi.

He said of the Barcelona star: "Messi is a diamond in its purest form, Cristiano Ronaldo, again, is a tremendous player, but does not radiate the same feeling that Messi has.

"Cristiano Ronaldo is a great player, but in recent times has not improved as much as Messi.

"Maybe he has lost his enthusiasm. I don't know ..."