Valencia defender Ricardo Costa has admitted that his side have to up their game when they face Barcelona this Sunday.
Los Che play the Blaugrana at Mestalla this weekend, but the centre-back has insisted that they have to do better than they did against Espanyol.
“We really noticed [Coach Miroslav] Djukic after the match,” he told AS. “And it was the right time to do so.
“We feel ashamed of the game we played at Cornelia El-Prat.
“We have to improve, work harder and raise our game against Barca.
“We will have to be perfect to beat them.”