Reports in Sweden have claimed Celtic star Benjamin Nygren has been told to isolate due to illness on international duty.
The Celtic midfielder is thought to be one of three players who have taken ill while away with the national team.
Nygren had scored in Sweden's 3-1 win over Poland on Monday night but has now reportedly taken unwell.
Fotbollskanalen state that Nygren, ex-Celtic defender Gustaf Lagerbielke and Yasin Ayari are sick and won't train on Thursday due to cold symptoms.
Press officer for the Swedish FA Petra Thoren reportedly explained: "Cold symptoms. They are being kept isolated so that we can keep this down to as few numbers as possible."
It is not yet clear whether the trio will travel for the next match, against Bosnia-Herzegovina on Friday.
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Eric Smith has been added to the national team squad in response to the illness issue.
The football association confirmed: "Eric Smith will join the men's Nations League squad on Wednesday evening due to an additional case of illness in the squad.
"The men's national team continues its preparation for the Nations League with training on Wednesday afternoon and Thursday morning. On Thursday afternoon, the team travels to Bosnia-Herzegovina for Friday's match.
"Given the uncertainty surrounding illness in the group, head coach Graham Potter chose to call up Eric Smith, St Pauli, on Wednesday. Eric Smith was part of this summer's World Cup squad."
