Arsenal star Oleksandr Zinchenko faces a race to be fit for the north London derby against Tottenham.
The Gunners left-back suffered a calf strain in training, the Ukrainian FA has confirmed.
Zinchenko is set to miss the Premier League trip to Brentford on Sunday and the upcoming international break with Ukraine.
A statement from the Ukrainian FA said: “The Arsenal player suffered a calf muscle injury during training at the club, which will require about two weeks for treatment and recovery.
“Oleksandr immediately personally informed the head coach of the Ukrainian national team, Oleksandr Petrakov, of the unfortunate news by calling him. We wish Sashka a speedy recovery.”
Arsenal manager Mikel Arteta has since insisted the club has not yet decided on whether to play Zinchenko against Brentford on Sunday.
Arteta said in his pre-match press conference: “Well again we have to wait until tomorrow to make that decision.
“What we have decided to do for international week doesn’t mean it will be the same this weekend.”
When pressed about team news, Arteta replied: : “Unfortunately the update will be tomorrow after the last training session.”
Should Zinchenko miss out on the game against Brentford then that would confirm the diagnosis from Ukraine’s FA and the defender would then be a doubt to face Spurs on October 2.
The £30million summer signing from Manchester City has made an immediate impact for the Gunners.
Despite losing their 100 per cent record with defeat to Manchester United, Arsenal remain top of the Premier League table after six matches.
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Zinechnko missed two games earlier this season due to a knee strain.
His latest injury problem will present an opportunity for left-back Kieran Tierney.