Barcelona beat Sevilla 4-0 on Sunday to move second in La Liga but ended the game with nine men as Ronald Araujo and Ousmane Dembele were sent off late on.
Luis Suarez, Arturo Vidal, Dembele and Lionel Messi were all on target as Barca made Sevilla pay for missing a number of chances to open the scoring at Camp Nou.
However, Barca's win was tainted by Mateu Lahoz's late show. The official sent off Araujo on his Barça debut for a last-man challenge on Javier Hernandez without even appearing to consult VAR, which may have reversed his soft decision. He then dismissed Dembele, too, during the protests which followed.
Barcelona and Sevilla went into the game on the back of good results. Barca had won three in a row in all competitions since defeat at Granada and Sevilla came back to win 3-2 against Real Sociedad in their last match. Following Sunday's game, the Catalan side are now second in the La Liga table with 16 points from eight matches, while Sevilla sit sixth with 13 points.
Suarez opened the scoring in the 27th minute after Sevilla's Luuk de Jong missed a string of chances. The Uruguayan scored a brilliant bicycle kick after good work from Nelson Semedo.
Barca preceded to blow Sevilla away in eight first-half minutes. They increased their advantage thanks to a goal from Arturo Vidal after a good team move and a goal from Ousmane Dembele in the 35th minute made it 3-0. A free-kick from Messi -- his first goal of the season -- wrapped up the win before the late drama.