Petr Cech has an injury to the back of the thigh, according to the official website of the Gunners..

Thus, the 36-year-old keeper is expected to miss about 3-4 weeks..

Czech got a damage in the game against Watford in the 7th round of the Premier League, then in the 46th minute of the fight Bernd Leno stepped in instead..

Earlier, the head coach of Arsenal Unai Emery said that with each match his team becomes stronger.

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