Arsenal will be without new boy Kieran Tierney until at least October as he continues his recovery from injury.
The Scottish defender, 22, joined the Gunners from Celtic on deadline day in a £25million deal.
Tierney passed his medical, but the club expect him to endure at least seven weeks on the sidelines.
He is recovering from a groin injury and is reportedly undergoing further treatment after a double hernia operation.
Arsenal have now have released an update on their injured players ahead of this weekend’s match against Burnley.
In regard to Tierney, it read: “Groin. Continues to receive treatment and further assessments. Aiming to participate in full training in October.”
Granit Xhaka is a doubt for the first home game of the season after suffering with bruising to his lower back and leg.
Rob Holding is now training with the first-team as he continues his on-field rehabilitation.
But Hector Bellerin and Dinos Mavropanos will be out of action as they continue their recovery from injury.
Tierney has only taken part in light training with his new team-mates since he completed the switch from Scotland.
But speaking about his move, he said: “It feels great. I’m delighted to be here.
“Obviously I’m injured now, but I’m just looking forward to getting back on the pitch, training and getting involved with the squad.
“It’s been fine for me. I’ve been working hard in rehab and I’ve had good people around me as well. It’s been easy for me.
“At Celtic I was training hard, working hard and just looking to get back fit. That was my main focus.”