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The Gunners faced the Reds in the Premier League over the weekend and played a 2-2 draw.
Bukayo Saka and Mikel Merino scored for the Gunners, while Virgil van Dijk and Mohamed Salah scored for the Reds.
Gabriel suffered an injury during the game and was forced out six minutes into the second half.
“We still don’t have details about that,” said Arteta.
“For sure, he could not run. I don’t know what happened.
“I don’t know if it’s the knee joint or the ankle. They’re assessing him”.
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