Papu Gómez and Ronald Araújo provided the goals in the Sánchez Pizjuán as Sevilla and Barça drew, with leaders Madrid facing Athletic on Wednesday.
The first round of the Luis Rubiales reformatted Copa del Rey is the polar opposite of what the Superliga breakaways clubs aspire to in the game.
Real Madrid's Brazil forward Vinicius further demonstrated his importance to Carlo Ancelotti's side in the 2-1 victory over Sevilla on Sunday night.
Atlético Madrid were left to rue the vagaries of VAR in the 1-0 defeat against Sevilla as Real Madrid and Barcelona look to capitalize in the title race.
Barcelona came back to beat Sevilla 3-0 and knock them out of the Copa del Rey. Alfredo Relaño looks at the match.