The Englishman reveals that Aston Villa player Victor Nilsson Lindelöf will be the team captain when Switzerland awaits away on Saturday.
"He's an experienced player who knows what's required in the national team. He's a good leader in the group," Potter said.
In recent weeks, Isak has been out of the squad for four games for Liverpool, but he sat on the bench for the entire game when there was a loss against Manchester City (0-3) in the league on Sunday.
Tottenham player Lucas Bergvall, 19, recently suffered a concussion but is on his way to the training camp. Potter says he believes Bergvall can train fully with the team later this week.
Sweden is bottom of their World Cup qualifying group with just one point. After the away match against Switzerland, the qualifiers will conclude at home against Slovenia on Tuesday next week.
Blue and yellow cannot take a direct place to the World Cup in the USA, Canada and Mexico this summer. The team could theoretically finish second in the group and reach a World Cup playoff in March that way, but most likely Sweden will have to rely on a presumed place in the playoff through the group victory in the Nations League last year.
