Real Madrid face their rivals at the Camp Nou on Monday evening.
The former Liverpool star said: “This Barcelona team are very good, and are still very good. In recent years they have won many titles, and we will fight hard to beat us because it will be crucial.
“The two matches, both at the Camp Nou and the return will be very important.
“However, there are many more points also to be played for, so the match will not be decisive, but the result will still be important for those with aspirations of the title.
“This team has great potential in attack, with great scoring ability. If we play well, and are strong in attack and defence, that is the recipe to win at the Camp Nou.”
