Barcelona fullback Dani Alves rates PSG striker Zlatan Ibrahimovic as a big danger in tomorrow night's Champions League clash.

Ibra had one ill-fated season at Barca and Alves knows the Swede will be out for revenge.

"Ibrahimovic is a big concern, he is a great player," said Alves.

"We must work hard to prevent him from scoring. He's an important player and can score at any time, but we also must take into account the other players of PSG."