Ex-Celtic star Kieran Tierney suffered a dislocated shoulder in Arsenal's game against West Ham and faces a lengthy spell on the sidelines.

The left-back had been nursing a shoulder issue which he hurt again early doors in his side's 3-1 win earlier this week.

The Gunners have since confirmed the injury.

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Though no timeframe has been given for his return.

One the Arsenal website, KT's injury update read: "Kieran Tierney - Right shoulder. 

"Dislocated right shoulder during the West Ham United (a) match. 

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"Currently undergoing further assessment and investigations."

Tierney has been unlucky with injuries since his £25million move from Parkhead.

He's made just ten appearances for Arsenal since the switch having been forced to sit out with a hernia problem and then a thigh issue.