The summer signing from Bayern Munich started the friendly clash at the Estadio Municipal in Burgo de Osma but was upstaged by a teenage team-mate
The Croatia striker, who joined Atletico from Bayern Munich on a four-year deal earlier this month, was named in Diego Simeone's starting XI for the clash at the Estadio Municipal in Burgo de Osma.
Defender Diego Godin, forward Raul Garcia and midfield duo Koke and Gabi were also involved from the first minute as Atletico began preparations for the defence of their Liga crown.
However, it was 18-year-old forward Hector Hernandez who stole the show by netting the only goal of the game against the second-tier side.
Hector found the net a minute before half-time to ensure a successful start to pre-season for Atletico.
Simeone's side, beaten Champions League finalists last season, next head to San Francisco to take on MLS outfit San Jose Earthquakes at Candlestick Park on Monday.