The club have confirmed that the Bosnian will return in October at the earliest
Arsenal left back Sead Kolasinac will miss eight to ten weeks with a knee injury.
The Bosnian was substituted during the Gunners’ pre-season friendly against Chelsea on Wednesday, and the club have now confirmed the severity of his issue.
Kolasinac was injured as Arsenal drew 1-1 with Chelsea in Dublin
In a brief note on their website, Arsenal confirmed Kolasinac has: “Sustained an injury to his left knee.”
They added that he: “Will be out for eight to ten weeks.”
This news comes as a blow to new manager Unai Emery, who will have been hoping for a full strength side ahead of next week’s Premier League opener against champions Manchester City.
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However, he must now do without Sead Kolasinac until October at the earliest.
The Gunners also updated on Aaron Ramsey’s situation, as he missed the Chelsea match with a calf strain.
He will continue to be assessed and is aiming to return to training next week.