Valladolid forward Javi Guerra silenced the Nou Camp when he headed in a corner in the 10th minute .
Barca were level four minutes later when Alexis lashed the ball home from just outside the penalty area .
Valladolid forward Javi Guerra silenced the Nou Camp when he headed in a corner in the 10th minute but Barca were level four minutes later when Alexis lashed the ball home from just outside the penalty area .