Arsenal manager Arsene Wenger is not concerned by the injury to defender Shkodran Mustafi because he believes the club have enough strength in depth to cover for him.
The Germany international injured his hamstring in the recent victory over Stoke City and is only expected to return in 2017.
The 24-year-old had struck a promising partnership with Laurent Koscielny, but Gabriel Paulista has proven himself to be an able replacement.
As such, Wenger takes the view that the Gunners are in a position to cope with the loss of Mustafi.
He told the Daily Mail: "It's a challenge for us because we had good defensive stability. We had many tests, with players like Santi Cazorla out of the team.
"We have managed to deal with it and that's another challenge. We have Gabriel who can come in and I am confident he can do well."
Arsenal, who are second in the Premier League standings behind Chelsea, have two tough league matches in the next seven days. They travel to Merseyside to take on Everton on Tuesday evening, before an away assignment against Manchester City on Sunday.