Fulham U21 v Athletic Bilbao U21

[Colton F.C.]

What is also a bit more impressive here is that Bilbao B (as they're called in Spain) play in the 2nd tier of the spanish league- against a few other U23 teams but mainly mens teams. And they're currently top of that league- so this is a very impressive result.

Sadly, not quite as good as that. Athletic club B (Bilbao) are in the Segunda Federation, the fourth tier of Spanish Football. In fact there are five separate Groups (Divisions) amounting to 90 clubs at that level.  So sort of National League.  They are top though.

https://www.tntsports.co.uk/football/segunda-federacion/standings.shtml