A solid defensive performance by Atletico Madrid saw manager Diego Simeone's team claim a 2-0 victory at Las Palmas in the first leg of the round of 16 in the 2017 Spanish Copa Del Rey on Tuesday.
Goals from Koke and Antoine Griezmann gave Atleti the advantage before the teams return for their second encounter.
In the night's other ties, Valencia were soundly thrashed at home, losing 4-1 to Celta Vigo, and Eibar claimed a comprehensive 3-0 victory at Osasuna.
Deportivo La Coruna and Alaves drew 2-2 at the Estadio Riazor, leaving the tie delicately poised.