Also thanks to a goal by the former Bayern professional David Alaba, Real Madrid has won the prestigious duel with FC Barcelona again.
The record champions won 2-1 (1-0) in the almost sold-out Camp Nou stadium on Sunday.
Alaba scored in the 32nd minute for Real's lead, which Lucas expanded in stoppage time.
Sergio Agüero could only shorten for Barcelona.
Real moved to the top at least temporarily before the top match between Atlético Madrid and Real Sociedad San Sebastián in the evening.
In a fast and largely even game, the Catalans initially put a lot of pressure on and were able to put Real on the defensive. The hosts' first big chance came in the 17th minute, but Dest shot the ball well over the goal. Then Real became more offensive, Alaba hit with the left foot untenable for the German national goalkeeper Marc-André ter Stegen. Piqué had a chance to equalize in the 34th minute, but his header just missed the left post.
After half-time, the Blaugrana played strongly again, but could not use any chances. Real remained extremely dangerous, in the 63rd Karim Benzema almost scored another goal for Los Blancos, but Ter Stegen parried. After that, the game lost momentum at times. Barcelona pushed for the equalizer, but failed again and again due to the close real defense. Lucas then made everything clear with the 2-0, the Royal were able to win the 246th Clásico and beat Barcelona for the fourth time in a row.
For the first time since 2007, the two top clubs no longer faced superstars Lionel Messi and Cristiano Ronaldo.
Both clubs are in a transition phase.
The hopes rested on very young players, especially at FC Barcelona with Gavi (17), Ansu Fati (18) or Pedri (18) and Vinícius (21).