Leeds United are considering a move for a former Arsenal star this summer.
The player has a £20million release clause but a potential move is unlikely to be straightforward.
There is interest in the individual from other high-profile teams, including a surprise Champions League club.
Although he suffered relegation from the Premier League last season, the player is still very highly rated.
Leeds are looking to strengthen their squad following their return to the top flight.
Daniel Farke's side have already made one signing this summer, bringing in forward Lucas Nmecha from Wolfsburg.