Ronald Koeman also convincingly won his second match with FC Barcelona on Thursday.
The Spanish top club was 0-3 too strong for Celta de Vigo in the second La Liga round.
In bad weather conditions, Barcelona was the better team in Estadio Balaídos.
The score was opened early by top talent Ansu Fati, after which the score was increased in the second half by Lucas Olaza (own goal) and Sergi Roberto.
One blemish on the victory was that Barcelona played more than half with one man less.
Defender Clément Lenglet got his second yellow card just before half time and therefore red.
The victory was special for Barcelona, as the club last won at Celta in April 2015.
Since then, there have been three draws and three losses.
Koeman brought Barcelona back into a 4-2-3-1 system, opting for the same names as Sunday against Villarreal.
It meant that Frenkie de Jong was once again one of the two controlling midfielders.
Coming Sunday, a big test for Koeman's Barcelona will follow, when Sevilla comes to Camp Nou.