Ryan Mason has hit out at the concussion protocol that allowed David Luiz to play on following his sickening clash of heads with Raul Jimenez.
Luiz was left bloodied after the incident during Wolves ' win at the Emirates on Sunday while Jimenez suffered a fractured skull.
The Wolves striker was immediately taken to hospital after being knocked unconscious, while Luiz was bandaged up and played on until half-time.
Former England midfielder Mason was himself forced to retire in February 2018 after a clash of heads with Chelsea defender Gary Cahill while playing for Hull saw him fracture his skull.
The decision to allow Luiz to remain on the pitch has been criticised, and Mason has called for a change to the guidelines to ensure players are better protected.
He told talkSPORT: "I was quite upset to see something like that happen on a football pitch again, it's very concerning.
"It's a real shame my incident didn't change the perception; what is it really going to take for people to start realising this is something really, really serious?
"I'll be honest, I was shocked David Luiz was allowed to play on. I'm not criticising the Arsenal doctor because there's a protocol in place and I'm sure he's followed that.
"But that protocol that is currently in place is not enough; it's not enough just to have two or three minutes, it's not enough.
"It was a bad one; the noise, the impact, the speed of the challenge as well – it was a bad one. It didn't help that there were no fans and you could actually hear the point of contact.
"But I looked at that and thought immediately, neither of those players can play on. Sometimes you have to forget the protocol and have a bit of common sense.
"The game needs to change this rule. It's pretty clear that five minutes on the side of the pitch while there is pressure to get the game restarted is not enough to see if someone is concussed or not.
"This current protocol we have in place isn't okay and it's dangerous."
