The Blaugrana midfielder has warned his team-mates against dropping silly points as the Primera Division reaches a decisive stage in the season
The Blaugrana top the table on goal difference after beating Sevilla 4-1 on Sunday, just 24 hours after Diego Simeone's men lost 2-0 to Almeria and los Blancos saw off Villarreal.
Fabregas believes all three of the title contenders are on the same level but is nonetheless delighted to be back on top after Atletico had temporarily usurped them at the summit of the standings last week.
"La Liga is very equal at the moment," the former Arsenal captain told the club's official website.
"We have to play each other and we have to be strong. We can’t give away any advantages in games that are already going in our favour. I’m very proud of this team.
"In the first minutes we didn’t play well. They were very intense, but from the point Alexis scored [the equaliser] the game was ours.
"This was a very important match. When you have a chance to take the top spot you have to take advantage of it. It’s good to get it back so quickly.
"It was an important and fundamental match. We had to take the top spot in order to regain confidence."
Barcelona's next Liga game is a home clash against Rayo Vallecano on Febuary 15 at 19:00CET.