"But I don't think that Luis can regularly play whole games. He was playing all the time this year until he got injured and then got another problem when he came back.
"However, he is still a player who can be very useful at certain moments in certain matches."
Mancio also commented on striker Adriano, who is making his mark on loan to Sao Paulo and has caught the eye of Brazilian national Coach Carlos Dunga.
"Of course I am pleased for Adriano," he insisted. "If Dunga said these things then it must mean that he is doing quite well. I think this is important for him."