Alves is offering himself to Barca as he becomes a free agent.
He told Sport: "It would be taking advantage a bit to say now Barça need me. I always said I left because I saw things weren't how I thought they should be. You don't want to see everything that happened before my exit.
"I left saying that when Barça needed and wanted me I would return regardless of where I was. There's too much love, respect and care I have for this home. If Barca think they need me all they need to do is call.
"I believe I can add things wherever I go but at Barca now especially with the youngsters they have. We were young once and we weren't prepared to defend a responsibility as big as defending Barca is, no matter how good they are or how much they are spoken about. It's all new. You need a mix of young and old to give balance and the chance to fight for great things."
Alves added: "Joan (Laporta, president) knows what I think of him and everything he's done for Barca and all of us. it's nothing new. It's explicit and I've always said it. I'm delighted he's back again. He was left with a problem but I think he can solve it, if anyone can, he can.
"It's a challenge to put Barca back where they deserve. It's an era of transition and difficulty and they have to make that clear. Barca will return. It might be half a year. Three months. A year. But they will return because they always have. Those who love the club are ready to help in any way."
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