Luis Suarez said Barcelona must be ready if LaLiga leaders Real Madrid drop points as the title race nears its conclusion.
Two-time defending champions Barca kept their slim title hopes alive with a 1-0 victory over rivals Espanyol on Wednesday.
Suarez scored the only goal of the match in the 56th minute to relegate Espanyol midweek, while moving Barca to within a point of Madrid.
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Madrid can restore their four-point advantage against Deportivo Alaves on Friday and while Barca only have three games remaining, star forward Suarez insisted the Catalan giants have to be ready to pounce on any slip-ups.