Jordi Alba confirmed it in an interview to Weloba
Jordi Alba confirmed what one Weloba user observed seconds before Kun Agüero kicked the penalty, saved by Ter Stegen. "I've seen Mascherano indicating with his finger the direction where Kun kicked," said the full-back, that cleared that the Germand "played a super match."
Ter Stegen explained this wonderful episode. "Rafinha was indicating me one side, Mascherano the other one... I didn't know who to trust, so I decided it at the end, but the help was useful," confirmed Barça's keeper.
PIC. Mascherano pointing with his finger that Kun would kick to the left:
PIC. Ter Stegen is congratulated by his teammates