Arsene Wenger is not fully aware of the extent of Gabriel's injury but admits the 25-year-old will miss the start of the Premier League season, leaving inexperienced duo Calum Chambers and Rob Holding as Arsenal's only recognised central defenders.
"We have not even made a diagnosis in the medical room with our doctors or physios yet. I can't tell you more. He's in pain," said Wenger, according to arsenal.com.
"Let's hope the pain is not a sign of bad news. The only thing we have to know now is how big the damage is with his ligament.
"I've never seen an intelligent accident, they always look stupid. We have to take that.
"He played the ball 100 per cent and I think he rolled his ankle, but I don't know how it happened. It's part of our game.
"I don't think he'll have a scan tonight because we come back at midnight. I don't think so.
"Yes. We are very short [in defence]."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!