Barcelona boss Luis Enrique says his side need to improve if they are to challenge for the Spanish title.
Barca are one point off leaders Real Madrid, who have a game in hand, after Lionel Messi's hat-trick in Sunday's 4-0 win over Deportivo La Coruna.
Last season's runners-up are yet to find top form despite only conceding nine goals in 19 La Liga games.
"There are still things we need to improve, both in attack and defence," said Enrique.
"That's the only way that we can challenge for titles, which is our main target for the season."
Enrique - who is rumoured to have fallen out with Messi - praised his star player, who has scored 19 league goals in as many games this season.
"He always been playing a very high standard of football. I never noticed any drop in his form."
Midfielder Andres Iniesta said: "Looking back at the first half of the league season, we haven't done badly. But we still need to get a lot better."
Next up for Barcelona is a Spanish Cup quarter-final first leg with league champions Atletico Madrid on Wednesday.
"It'll be a very tough, intense game against Atletico," Iniesta said. "They're a strong team. We'll need to do as well as possible and avoid committing errors."