It promises to be a tense fifth round of games for FC Barcelona and Atletico Madrid in the Champions League on Tuesday as their future in the tournament is on the line.
Although both sides lead their respective groups, a defeat for Barca at home to Porto would put its place in the last 16 under threat, while a defeat for Atletico away to Feyenoord could see it drop to third in the group and leave it facing another early exit from the tournament.