The Catalans twice surrendered a lead to draw 2-2 with Getafe, meaning they will slip to six points behind La Liga leaders Atletico Madrid should they beat Levante on Sunday.
And Xavi refused to sugar-coat his feelings on Barca's season, insisting they need a miracle if they are to retain the title they comfortably won last year.
"We're f****d," he told reporters . "We didn't have a good season, luck was not on our side and we were not competitive in many aspects. Despite the Supercopa de Espana win, we must wipe this season clear.
"We have to be self-critical. Except for a miracle, we have lost the league. We have to improve a lot, but from within."
Barca travel to Elche next weekend before their final game of the season at home to Atletico Madrid, although if the Rojiblancos win their next two games then they will be Spanish champions already.