William Carvalho will undergo surgery tomorrow to solve the problems created by the L5-S1 spinal disc herniation that he suffers. The player has been examined by specialist in Seville and Portugal, and all have reached the same conclusions and therapeutic possibilities. By request of Carvalho, the operation will be done in Lisbon and will be supervised by the head of Real Betis Balompié medical services, Doctor José Manuel Álvarez. After a first rest phase of rest, approximately one week, Carvalho will be transferred to Seville to begin with his rehabilitation. The estimated time that the player will be out would depend on the evolution of his recovery.