The midfielder was selected to start at the King Power Stadium but he was removed shortly before half-time and replaced by Martin Odegaard.
The youngster was one of five players to start against the Foxes that also started against Benfica on Thursday and the quick turnaround may have contributed to the apparent groin problem that he sustained.
Emile Smith Rowe has been in fine form for the Gunners but Arteta admits the midfielder suffered a ‘muscle’ injury and he was forced to take action.
‘It was a muscle injury,’ admitted Arteta. ‘He wast feeling comfortable to carry on, we decided to take him off but hopefully it’s not too bad.’
Arsenal recorded a morale-boosting win in the Midlands, despite falling behind to an early goal from Youri Tielemans.
However, the Gunners settled nicely and drew level through David Luiz before taking the lead on the stroke of half-time when Alexandre Lacazette converted from the penalty spot. Leicester lost Jonny Evans and Harvey Barnes to injury after the break and Nicolas Pepe made the Foxes pay by adding a third.