Barcelona failed to fly to the top four with a 1-1 draw against Eibar in La Liga on Tuesday at the Camp Nou.
Barcelona manager Ronald Koeman admitted that it is very difficult to regain La Liga after losing two more points at home against Eibar.
The Catalan giants sit sixth on the La Liga table with a seven-point gap with league leaders Real and Atletico Madrid.
Barcelona have just won seven games out of 15 under Ronald Koeman and the coach believes there is little chance for the title.
"I am realistic, it will be very difficult to be champions," the Dutchman told reporters after the final whistle.
"Nothing is impossible, but you have to acknowledge the gap. Atletico look very good to me, very strong, they don't concede many goals."
Tuesday's failure took place without Lionel Messi. The Argentinian captain was kept out of the match against Eibar as a precaution with an injury.
"You cannot say Barca play better without Messi. He is a different player," Koeman admitted while insisting that his team could have taken all three points against the Basques.
"In general terms, we played well. But individual errors cost us the points.
"We deserved to win, we did what was needed. [Eibar] only had one shot on goal.
"We created chances, but we didn't score the penalty and then a defensive error... we played well, we worked hard and did enough to win, but this is happening to us far too often.
"If we had gone in front (with the penalty), the team would have been more confident, but you have to put the ball in the net."
Barca will play against Huesca in 2021, with their first match of the New Year.