The Brazilian is reported to be closing in on a world-record £199million switch from Barca to Paris Saint-Germain, and if that is the case, a replacement will be needed, and Ozil's name has been mentioned.
The German international is in the final year of his contract with the Gunners, and as has been well documented, has yet to pen a new one, leading to reports he could be on the move before the transfer window closes.
Arsenal boss Arsene Wenger has admitted to being relaxed about the situation, but that could change if Barca follow up their reported interest in the player by making a bid.
Barca have been heavily linked with Liverpool's Philippe Coutinho, but with the Reds determined to fight off all interest, the Catalan giants are being forced to look elsewhere, and Ozil is said to be a target.
Ozil has already had one spell in La Liga with Real Madrid and the chance to return there with Barca is sure to appeal, if the rumours turn out to be true.