The full-back fears the former Blaugrana forward could come back to haunt the club in the up-coming Champions League quarter-finalsDani Alves has claimed that Paris Saint-Germain striker Zlatan Ibrahimovic is a "big worry" for Barcelona ahead of the Champions League quarter-finals.
The Sweden striker has been cleared to play in both legs of the tie after successfully appealing his two-game ban following his red card against Valencia, and Alves has warned of the danger posed by his former team-mate.
The Brazilian told RMC: "Ibrahimovic is a big worry for us. He is a great player and a formidable athlete. I had the honour of being his team-mate.
"We have come up against each other before and I will approach the game in the same way I did then."
The former Valencia defender, however, was keen to stress that PSG have many other talented and match-changing players in their ranks despite Ibrahimovic being the centre of attention.
"We'll have to work very hard to make sure he doesn't score goals," Alves continued.
"We know that he is a very important player that can score at any moment, but we also need to be wary of the other Paris Saint-Germain players."
Carlo Ancelotti's men host the 2010-11 European champions on April 2 before the return leg at Camp Nou eight days later.