MADRID (AFP) - Barcelona coach Luis Enrique believes Luis Suarez has already proved his worth despite not having even played a competitive football game since his £75 million (S$150 million) move from Liverpool.

The Uruguayan will still be unavailable for over a month after receiving a four-month ban for biting Italian defender Giorgio Chiellini at the World Cup in June.

Suarez could make his debut in Enrique's first El Clasico in charge of Barca away to Real Madrid on October 25. And Enrique believes the 27-year-old's attitude in training has already made him an important signing for the club.

"He is adapting and waiting for his opportunity. He is training as if he could play tomorrow and that was our objective.

"Already, even without playing, I think he is helping us and has been a good signing."

Barca have started Enrique's reign with four consecutive wins and four clean sheets for the first time in the club's history. However, the former Barca and Spain international midfielder still received criticism for making nine changes as the Catalans struggled past APOEL Nicosia 1-0 to open their Champions League campaign on Wednesday.

There are likely to be another wave of changes for Sunday's trip to bottom of the table Levante. Enrique insisted he will continue to rotate his squad throughout the season and hinted even Lionel Messi would not be spared from his changes from game to game.

"Over the course of the season I am going to need all my players. The priority just now is Levante and we will see where we are after that.

"Being without Messi would affect us like any other team. If he could play every minute he would, but I understand that is difficult. I will manage it as best I can, but always thinking about what is best for the team."