Wojciech Szczesny has added to Arsenal's injury concerns after pulling out of Poland's squad for two friendlies due to a bad back.
The goalkeeper was due to link up with his national team this week ahead of the games against South Korea and Belarus after playing in Arsenal's 2-1 defeat by Tottenham Hotspur on Sunday.
However, the 21-year-old has withdrawn from the party for the fixtures and has been replaced by Genk keeper Grzegorz Sandomierski.
Gunners boss Arsene Wenger will be hoping that Szczesny's withdrawal is merely a precautionary measure given the way the injury problems are mounting up at Emirates Stadium.
Bacary Sagna joined several team-mates on the sidelines after the full-back was ruled out for three months after suffering a fractured fibula against Spurs.
Wenger is already without Thomas Vermaelen, Laurent Koscielny, Johan Djourou, Abou Diaby and Jack Wilshere as he looks to revive the Gunners' season.
The Arsenal chief has already written off his team's Premier League title hopes after the derby defeat left his team sitting in 15th position after seven games and 12 points behind leaders Manchester United.
Arsenal's next game is at home to Sunderland in the league on Sunday 16th October before travelling to Marseille for a UEFA Champions League tie.
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