The former Chelsea and West Ham manager is now in talks with the Swedish FA to replace Jon Dahl Tomasson after the Dane's dismissal.
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Now with AIK, Papagiannopoulos, 35, played for Potter at Ostersunds and told Lundh on Fotbollskanalen: "The world of football is brutal. He did a good job at Brighton, then it has gotten a little worse now at Chelsea and West Ham. I think the pressure there is completely different than what you are used to.
"I think the national team could perhaps be a possibility. But not the Allsvenskan.
"We chat sometimes. I also chat with Billy Reid, who was an assistant coach. I have a little more contact with him."