Neymar is number 10 in 90min's Top 20 Greatest Footballers of the Decade series. Follow the rest of the series over the course of the next two weeks.
They say records are only made to be broken. But overturning a four-goal scoreline in the second leg of a Champions League knockout match isn't just difficult. It's actually impossible.
Barcelona became the first team to go through after losing the first leg by two goals during the 1999/2000 season while another Spanish side, Deportivo de La Coruña, came back from three behind a few years later against AS Monaco.