Fulham midfielder Hugo Larsson was called up on Friday - two days after captain Graham Potter presented his squad. This after Mattias Svanberg, of Wolfsburg, was injured.
On Sunday, it was announced that Celta Vigo's Williot Swedberg would also take a place in the squad when striker Gustaf Nilsson, of Hertha Berlin, withdrew due to injury.
Larsson and Swedberg were in contention for this summer's World Cup, but were overlooked by Potter.
John Mellberg has also been called up from the U21 national team for the upcoming training camp. Red Bull Salzburg defender Mellberg has been included in the senior national team because Braga defender Gustaf Lagerbielke is out with a minor injury.
The national team will gather in Stockholm on Monday and the first training session will be held on Tuesday. Lagerbielke will begin rehabilitation, but the aim is for him to be ready to play during the camp, the association writes on its website.
On Friday, Blågult will face Romania and three days later Poland awaits at the national arena in Solna. After that, away matches will be played against Bosnia-Herzegovina and Romania in the B division of the Nations League.
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