The Barcelona coach Pep Guardiola says his side's 2-1 loss at Real Sociedad was a timely wake up call ahead of Wednesday's Champions League semi-final second leg match against arch rivals Real Madrid.
Sociedad came from behind to secure a surprise win and end Barcelona's 32-game unbeaten league record stretching back to mid-September, when they lost 2-0 at home to Hercules.
Barcelona sit eight points clear of Real in the La Liga and need four points from their remaining four games to secure the league title, but the priority is reaching the Champions League final as they defend a 2-0 first-leg lead.
A fourth meeting in 18 days with old foes Real now awaits Barcelona, who hold a commanding 2-0 lead from the first leg in Madrid, but Guardiola anticipates a tough battle in the return leg at Camp Nou.
