Casillas, dropped for the second game in a row, came off the bench early on to replace sent off goalkeeper Antonio Adan.
Real were eventually able to see off the challenge of Real Sociedad 4-3.
Casillas, dropped for the second game in a row, came off the bench early on to replace sent off goalkeeper Antonio Adan.
Real were eventually able to see off the challenge of Real Sociedad 4-3.
