Barcelon lost their first game under Xavi in a 1-0 defeat to Real Betis.
Juanmi scored the winning goal for Betis after a great counter-attack which saw him teed up by Tello, and he slotted it into the bottom corner.
This defeat ends a six-match unbeaten run for Barca in all competitions, and leaves them seventh in the table.
Barca play in the Champions League on Wednesday against Bayern Munich while Betis have now won their last five games, and move up to third for now.
