Arda Turan is seen as the most viable option as a straight swap, but a flexible squad opens up other alternatives
The muscle injury that will keep Lionel Messi out of action for three weeks has put Barcelona's squad depth under the microscope. Coach Luis Enrique has repeatedly said that Arda Turan can cover the position of the Blaugrana's number 10, but losing Messi means losing more than your average starter.
The Argentine's ability to create something from nothing is unrivalled within the squad, although his absence was adequately covered by Neymar last season.