Atlético Madrid manager Diego Simeone has unveiled his squad for Wednesday's crucial Champions League quarter-final first leg against Barcelona, and four key players are notably absent.

Fresh off a disappointing La Liga defeat to the same opponent this past weekend, the Rojiblancos are looking for immediate redemption on Europe's biggest stage. However, their task at the Spotify Camp Nou just got tougher.

The confirmed squad list reveals that Atlético will be without first-choice goalkeeper Jan Oblak, midfielder Pablo Barrios, defender José María Giménez, and recent signing Johnny Cardoso. This represents a significant blow to Simeone's plans, stripping the side of experience at the back and options in the engine room.

This high-stakes clash promises to be a tactical battle, and these absences will force Simeone to adapt. All eyes will now be on how Atlético's reshuffled lineup responds under the bright lights of Champions League knockout football.