The 23-year-old made his Gunners debut last week but now faces a spell on the sidelines in isolation
New Arsenal signing Ben White will miss his side's clash against Chelsea on Sunday after testing positive for Covid-19.
White, 23, arrived at Emirates Stadium this summer from Brighton in a transfer worth £50 million ($69m).
He made his debut in last week's Premier League defeat to Brentford but now faces a spell on the sidelines.
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White had been expected to retain his place in the middle of defence this weekend despite Arsenal going down 2-0 in a shock loss to the Premier League newcomers on the season's opening day.