La Liga returned after the Christmas break this weekend, and Spain's giants had contrasting fortunes in their respective fixtures.
Carlo Ancelotti's Real Madrid side showed no let-up in their third consecutive game on the road, picking up all three points at the Benito Villamarín.
FC Barcelona have decided to exercise their right to bring back Emerson Royal from July 1, following two seasons on loan at Real Betis.
Athletico Madrid are back in the top spot after a 1-1 draw against Real Betis at on Sunday in La Liga.