Casillas spent his second successive league game on the bench on Monday night.
The London Evening Standard reports that Arsenal could make a move for the goalkeeper as Casillas is considering a shock exit.
Casillas is currently behind Diego Lopez in the pecking order at the Bernabeu.
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Being an amiable guy is good for you and Jurgen Klopp is living proof.
Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.