Barcelona and Real Madrid are institutions of Spanish football, with the reverberations of their bitter rivalry felt across the world each year in El Clasico.
Between them they have won over 50 league titles, dominating the domestic landscape, and each year on the continent they are inevitably in the mix in the fight for European supremacy.
Success is second nature to these clubs, but even the biggest teams endure peaks and troughs over the course of time.
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So, have Barca and Real ever experienced relegation?