Barcelona have promoted youth team winger Isaac Cuenca to the first team with an improved contract which will tie him until 2015, the European champions said on Friday.
Cuenca, 21, made his debut in the Champions League last October and has made 15 first-team appearances since.
"We have had a tough season so far," defender Gonzalo Rodriguez said. "We need a special performance to help us to believe in ourselves again."
Leaders Real Madrid, who hold a five-point advantage over second-placed Barca, host La Liga's bottom club Real Zaragoza on Saturday.
Jose Mourinho's team are likely to be without the injured Angel di Maria and Sami Khedira, who missed Thursday's training session.
Promoted Rayo Vallecano host King's Cup semi-finalists Athletic Bilbao, who are seventh, on Saturday having bolstered their squad with two new loan signings.
Brazilian striker Diego Costa has arrived from Atletico Madrid while last season's top scorer when they were in the second division with 20 goals, Argentine Emiliano Armenteros, returns for another spell from Sevilla.
"I am convinced we can maintain our top-flight status," Resino said at his presentation. "There are four or five teams above us in the league who are worse then Granada."
