Raphinha and Robert Lewandowski's strikes helped Barcelona move eight points clear at the top of La Liga with a 2-1 win at Real Betis on Wednesday.
The Catalans put pressure on second-placed Real Madrid, who host Valencia on Thursday, by scraping a narrow win from an intense clash at the Benito Villamarin.
With French winger Ousmane Dembele out injured for the next few weeks, Raphinha grabbed his chance to prove himself.
Dembele's superb form had limited the Brazilian's minutes since his move from Leeds United last summer.
Raphinha put Barcelona ahead in the 65th minute and Lewandowski, back after a three-match league ban, netted the second with 10 minutes to go.
Jules Kounde scored an unfortunate own goal to give Betis a fighting chance of a point in the final stages but Barcelona held out for the win.
"I think we had a good game, our play was very good, excellent I would say," Barca coach Xavi Hernandez told Movistar.
"We played a great game at a very difficult place to come. I'm very happy not just for the result but for how we played, we've improved a lot from the Girona game."
Barcelona had won their previous three league games 1-0, including against Catalan rivals Girona last weekend in a flat performance, but were operating on a higher level in Seville.