Real Madrid Castilla lost to Barcelona B 3-1 in the mini derby yesterday.
Alex Fernandez was sent off for the Castilla and while Alvaro Morata had Real 1-0 ahead, the dismissal swung the momentum in Barca's favour.
Argie Sergio Araujo struck twice in four minutes midway through the second-half to put the visitors 2-1 ahead, then Gerard Deulofeu finished off Real with a converted penalty 20 minutes from time.