Diego Costa made a goalscoring return to Atletico Madrid with a second-half strike in their comfortable 4-0 Copa de Rey win at Lleida.
Spain striker Costa agreed a move back to Atletico from Premier League champions Chelsea in September but was unable to play for Diego Simeone's side until the new year due to the club's transfer ban.
The 29-year-old, who spent four years at Stamford Bridge before falling out with Blues boss Antonio Conte last summer, quickly made up for lost time as he grabbed Atletico's third goal of the evening just five minutes after coming off the bench to replace Angel Correa in the 65th minute.
It helped wrap up a routine win for Atletico in the first leg of their last-16 clash with the Spanish third division side after defender Diego Godin and Costa's fellow former Chelsea striker Fernando Torres gave them a two-goal half-time lead.
France forward Antoine Griezmann completed the scoring in stoppage time following the late dismissal of Lleida defender Marc Trilles.