Barcelona's director of football, Andoni Zubizarreta, has backed misfiring forward Alexis Sanchez to return to form.
The Chilean has only managed four goals in all competitions so far this season and he has come in for criticism in recent weeks.
Sanchez has been linked with a move to AC Milan, who Barca face in the UEFA Champions League on Wednesday, but Zubizarreta says that he still has faith in the striker.
"I do not know one player in the history of Barcelona that has arrived and always lived wonderful moments," he said.
"To evaluate a footballer, it is important to look at his overall performance rather than just in the middle of the season."