#4 Arsenal 0-0-0 Atletico Madrid
When Arsenal and Atletico Madrid line up against each other at the Emirates Stadium on 26 April, it will be the first time the two sides have met at the European stage. Arsenal might be the bigger club, but Atletico have had better European success in recent years.
The Rojiblancos have won the two Europa Leagues, the La Liga, the Copa del Rey, the Spanish Supercup and two UEFA Supercups in the current decade - in addition to reaching two Champions League finals. Arsenal's trophy cabinet for the same time period has three FA Cups and three Community Shields with no impact whatsoever in Europe.
Arsenal had been tipped for the title since the group stages and reinforced their credentials with a thrashing of AC Milan in the Round of 16 - but their impressive run has been blighted with losses to the likes of Cologne and Ostersunds.
Atleti had dropped down to the Europa League after finishing third in their Champions League group behind Roma and Chelsea and their 100% record was eradicated when they lost to Sporting in the quarter-final second leg despite an aggregate victory.
However, Arsenal might be more passionate about winning the title since this is the only route left for them to reach the Champions League next season. While Atleti are second in the La Liga and virtually assured of finishing in the top four, Arsenal lie 13 points behind the final Champions League spot in England.