The centre-back joins Abou Diaby, Lukasz Fabianski, Tomas Rosicky and Andre Santos on the sidelines after injuring his groin four minutes into the 1-1 draw with Everton
Arsenal manager Arsene Wenger has revealed that centre-back Laurent Koscielny faces three weeks on the sidelines after injuring his groin in the 1-1 draw at Everton on Wednesday night.
The 27-year-old was replaced after just four minutes by left-back Kieran Gibbs, and joins Abou Diaby, Lukasz Fabianski, Tomas Rosicky and Andre Santos on the treatment table.
“He has a groin strain. That's usually three weeks," Wenger told reporters.
Winger Theo Walcott gave the Gunners the lead after just 51 seconds – latching onto an Aaron Ramsey through-ball - but an error from right-back Bacary Sagna let Everton back into game through midfielder Marouane Fellaini.
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"We had a good start and after that I felt Everton came back. Their direct game was always a threat with Fellaini," he added.
"We have regrets on the goal we conceded but overall, I believe that 1-1 is a fair result.
"It was a game of remarkable intensity. We needed to show great spirit today to get away with a point because they were up for it. Overall I can only say I'm pleased with the effort we have put in the game."