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.
El Viejo Clásico
Entering the 21st century, other clubs offered significant challenges to Real Madrid, such as Atlético Madrid (their city rivals who were originally formed as an offshoot of Athletic Bilbao and thus have a similar name, crest and kit), Valencia and Barcelona. Athletic Bilbao were not among this group, now hampered by their self-imposed restrictive Basque-only player policy in an age of worldwide recruitment, exemplified by Madrid's "Galácticos" who won seven further Champions Leagues between 1998 and 2018.