Former Arsenal forward Billy Vigar is in an induced coma after suffering a head injury during a match for his current club Chichester City.
The non-league side confirmed that the 21-year-old, who was part of the Gunners' Under 21 side up until last year, sustained a 'significant brain injury' and is receiving the 'best possible treatment'.
Vigar joined the Step 3 side from Hastings this summer and was playing for City last weekend against Wingate & Finchley when he collided with a concrete wall while trying to keep the ball in play.
Reports claim that the forward's momentum saw his head make contact with the wall as his body turned after sliding to reach the ball.