Robbie Keane scored an early opener the last time Liverpool faced Atletico in the Champions League in Madrid, but can you remember the rest of the starting XI from the 1-1 group-stage draw in 2008?
The striker slotted home from Steven Gerrard's perfectly weighted through ball to give Rafael Benitez's side a 14th-minute lead at the Vicente Calderon, but Simao Sabrosa equalised for the hosts late on.
Former Liverpool pair Luis Garcia and Florent Sinama-Pongolle both started for Atletico that evening, but who lined up against them for LFC? Can you fill in all the Missing Men below?
Fill in the answers in the quiz below, or click Next at the bottom of the page to reveal the Missing Men...