Whenever Porto win a trophy, there is only one place to go in the city: the Avenida dos Aliados, in the downtown area.
That is where fans gather to wait for players and coaching staff to celebrate triumphs together. It was no different in May after the northern giants were crowned Portuguese champions again.
For a second, though, one of the team's breakout stars, Fabio Vieira, feared he would not be able to join his colleagues on the big stage. A security officer had not recognised him and asked for his identification.
Vieira could not believe it.