The 21-year-old Brazilian came on at 1-1 midway through the second half and helped fashion a wonderful winner for Raul with dazzling individual skill on the edge of the area.

Last season's runners-up Real had taken the lead against the run of play when Ronaldo received a Zinedine Zidane pass, evaded defender Ramon de Quintana and spectacularly sidefooted home from just outside the area in the fifth minute.

Cadiz got a deserved equaliser midway through the second half when Argentine striker Matias Pavoni hooked a volley past Iker Casillas.

Real grabbed victory five minutes from time when Raul poked home into the empty net after Robinho and Ronaldo combined to carve open the Cadiz defence.

Reigning champions Barcelona failed to get their title defence off to a winning start on Saturday when they were held to a 0-0 draw at promoted Alaves after an inspired performance by their former goalkeeper Roberto Bonano.

Unlike Cadiz, Celta Vigo celebrated their return to the Primera Liga with a 2-0 win at home to Malaga on Sunday.