Busquets will leave Barca at the end of the season.
Asked about a successor, he told EFE: “Rodrigo, for me, is now the best in his position. Apart from him, he is in a team like City, which is very dominant and has great players and a great coach, and has everything to keep improving.
"After Rodri, (Martin) Zubimendi is one of those who can best adapt, because he has already played, in the lower categories of the national team and at Real Sociedad, a football similar to ours. And (Joshua) Kimmich is the one who seems the most different to me from all those who have left, because he is a player who has converted to that position.
"And then there is the option of Nico (González), who we have on loan, who has left the house and I think he has conditions. Surely this loan (to Valencia) will have helped him to be a better player and gain a little experience. And I believe that he should be given the opportunity, apart from being the cheapest option."