If this is the case, Isak will miss a number of important matches in the Premier League and Champions League – and will not be available for the national team in the final European qualifiers against Azerbaijan and Estonia.
Isak was injured early in the CL meeting with Dortmund last week and will miss the return match in Germany next week.
He also misses the meetings with Manchester United (League Cup), Arsenal and Bournemouth (both in the league).
On Newcastle’s X account, Eddie Howe expresses the hope that Alexander Isak is back after the national team break.
If Isak has time to fully recover, he can be available for the home game against Chelsea on November 25.
This season, Isak has scored seven goals in twelve games for Newcastle.