Barcelona beat Celta Vigo 3-1, with Pierre-Emerick Aubameyang scoring twice in a game overshadowed by Ronald Araujo leaving the field in an ambulance.
Soon after the hour mark, Araujo collided with Gavi at Camp Nou and, after initially appearing to run off the injury, dropped to the ground before being attended to by medics.
That incident occurred shortly after Iago Aspas scored to give Celta hope after Memphis Depay’s opener and two goals from Aubameyang on either side of halftime.
However, a red card for former Barca loanee Jeison Murillo left the visitors with too much to do in Tuesday’s LaLiga match, after they came back from three goals down to draw 3-3 in the reverse encounter.
Dembele used deft footwork to take the ball past two opponents and pull it back for Depay to sweep past Matias Dituro, who got a hand to the shot but couldn’t keep it out.
Marc-Andre ter Stegen, who was sidelined last weekend due to sickness, stopped Thiago Galhardo at full stretch and then denied the same player from a header shortly after.
Before the break, Aubameyang doubled Barcelona’s lead, tucking into the bottom-right corner after Nestor Araujo failed to deal with Depay’s cross into the area.
Three minutes after the break, Aubameyang took advantage of further brilliant play with Dembele by clinically sweeping home Barca’s third.
Galhardo pounced on a weak pass from Ter Stegen to Araujo, but Celta’s momentum was halted when last man Murillo fouled Depay and was sent off.
Despite having Araujo leave the pitch with a head injury shortly after, and having a fourth goal for replacement Riqui Puig called out for offside, Barcelona had little trouble seeing out the game.