Arsenal defender Mathieu Debuchy has been ruled out for up to three months after successfully undergoing surgery on an ankle injury he picked up during the 2-2 draw at home to Manchester City on September 13.
Debuchy's injury is a big blow to Arsene Wenger as the side has lost a key member of their back four. As a result of up to three months on the sidelines, he's likely to miss some big clashes before the turn of the year.
Wenger told Arsenal.com: “He has had surgery and will be out for three months. A reasonable delay is three months.
“It all went well, but it can be a week or two earlier or a week or two later, but it will be around three months.
“It is a blow of course, how big it will be we will only know afterwards because it will be down to how well we replace him. We bought [Calum] Chambers for that.”
The Frenchman could return towards the end of December, and the chances are he could be touch and go for the trip to Anfield to take on Liverpool on December 20.
As well as missing this weekend's North London derby against Tottenham, games he is highly likely to miss include the clash with Chelsea at Stamford Bridge on October 5 and a home match against Louis van Gaal's Manchester United on November 22.
There are also crucial Champions League games against Borussia Dortmund, Galatasaray and Anderlecht as Arsenal look to qualify for the knockout stages of the competition yet again.
As a result, Calum Chambers could deputise for much of Debuchy's spell on the sidelines.