Ibrahimovic doubled Barcelona 's lead with a powerful effort from the edge of the area on 30 minutes .
Things did not get off to a good start for Xerez as cultured striker Zlatan Ibrahimovic seized on an error by David Prieto to score a placed shot .
striker doubled Barcelona 's lead with a powerful effort from the edge of the area on 30 minutes .
Things did not get off to a good start for Xerez as cultured striker Zlatan Ibrahimovic seized on an error by David Prieto to score a placed shot .