Everything you need to know as first meets second in the Primera Division at Camp Nou this weekend...
Barcelona meet Atletico Madrid on Sunday in what will be a huge title test for both teams in La Liga.
Ernesto Valverde's side saw their lead cut to five points at the top of the table after they were held to a 1-1 draw by Las Palmas in the Canary Islands on Thursday and, after arriving on the mainland just before 4am on Friday morning, their players were back in training at 12:30 to prepare for Sunday's big game.