Chasing a 2-0 deficit from the first-leg, Arsenal had to conjure up something special to defeat reigning champions Barcelona at the Nou Camp and progress to the Champions League quarter-finals.
While their chances were always going to be slim, Arsene Wenger’s team selection drew plenty of debate as BBC Five Live co-commentator Mills in particular felt it could have been stronger.
“If Arsene Wenger has had an eye on Everton in the Premier League on Saturday in his team selection, it is a very dangerous game. Wenger is already under so much pressure,” he explained.
"You can understand leaving out Per Mertesacker who is not great on the turn and Theo Walcott has been off form. It is a little bit of a risk but you can't come to the Nou Camp, play an under-strength side and get away with it."
Arsenal headed in to the encounter suffering from injuries, yet Wenger opted to leave Olivier Giroud, Francis Coquelin, Theo Walcott and Per Mertesacker on the bench.
Alex Iwobi was handed his Champions League debut, Danny Welbeck started the game up-front on his own while Mathieu Flamini and Mohamed Elneny were tasked with patrolling the midfield.
It looked a rather baffling decision from Wenger, but to his side’s credit they played well for the majority of the game and more than matched the hosts, at least on opportunities created.
But moments of magic from Luis Suarez and Lionel Messi killed off an unlikely comeback, and now Wenger will be hoping his selection pays dividends as they target all three points at Everton this weekend.