Without the injured Gareth Bale and suspended Cristiano Ronaldo, Real boss Carlo Ancelotti gave a number of his younger players another chance to impress despite being held to a 0-0 draw in the first-leg 10 days ago.
And the Italian was rewarded as Asier Illaramendi slotted home his first goal for the club before Angel di Maria’s penalty made it 2-0 at the break.
The hosts failed to add to their tally in the second-half, but were never threatened by their third-tier opponents as they eased into the next round where they will face Osasuna.
Atletico Madrid, meanwhile, were forced to come from behind to beat minnows Sant Andreu 2-1 on the night at the Vicente Calderon to progress into the last 16, 6-1 on aggregate.
Atletico will now face Valencia or Gimnastic in the next round. Racing Santander produced the surprise of the evening as they overcame a 1-0 first-leg deficit with a 2-0 win away to 10-man Sevilla.
Real Sociedad set up a meeting with Villarreal in the last 16 with a convincing 4-0 win over Algeciras thanks to goals from Javi Ros, Haris Seferovic, Griezmann and Carlos Vela.
And the Italian was rewarded as Asier Illaramendi slotted home his first goal for the club before Angel di Maria’s penalty made it 2-0 at the break.
The hosts failed to add to their tally in the second-half, but were never threatened by their third-tier opponents as they eased into the next round where they will face Osasuna.
Atletico Madrid, meanwhile, were forced to come from behind to beat minnows Sant Andreu 2-1 on the night at the Vicente Calderon to progress into the last 16, 6-1 on aggregate.
Atletico will now face Valencia or Gimnastic in the next round. Racing Santander produced the surprise of the evening as they overcame a 1-0 first-leg deficit with a 2-0 win away to 10-man Sevilla.
Real Sociedad set up a meeting with Villarreal in the last 16 with a convincing 4-0 win over Algeciras thanks to goals from Javi Ros, Haris Seferovic, Griezmann and Carlos Vela.