The winger was forced off in the first half of Tuesday's defeat.
He headed straight down the tunnel, limping as he did so, though did later join his team-mates in the dugout to watch the second half.
Arteta, though, says the problem was a fresh issue unrelated to the Bournemouth knock and the injury will need to be assessed in the coming days. On whether he regretted starting the winger, he added: ‘No. There was a knock that he had the other day and he was perfectly fine.Mikel Arteta and Arsenal branded 'unprofessional' over Kai Havertz decisionArsenal took the lead in Lens thanks to Gabriel Jesus’ excellent opener but were pegged back in the 25th minute by an even better finish from Adrien Thomasson before Elye Wahi swept home in the second half to secure a 2-1 victory for the Ligue 1 side.
‘Obviously after we have to make changes, the change of Bukayo obviously and two wingers that we are missing that give us a lot of threat and it’s different with other qualities that we have in the squad.
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