Athletic Bilbao B
Bilbao Athletic, officially named Athletic Club "B", is the reserve team of Athletic Bilbao, a football club based in Bilbao, in the autonomous community of Basque Country. The team will play in the Segunda División B in the 2018–19 season. Founded in 1964, the team holds home matches at the small stadium attached to the club's training facility at Lezama, or occasionally at San Mamés Stadium, with its 53,500-seat capacity, for important fixtures.
1903 Copa del Rey Final
This match has been identified as a catalyst for the establishment a few weeks later of what would eventually become Club Atlético de Madrid, after some Madrid-based Basque students among the spectators were inspired by the comeback victory by Athletic Bilbao and decided to form a local branch of the club.