Sergio Busquets is concerned at the number of goals Barcelona are conceding after they slipped to a 2-1 defeat at Leganes on Wednesday.
Barcelona led at the break after Philippe Coutinho handed them an early lead, but Nabil El Zhar and Oscar Rodriguez Arnaiz struck in the space of a minute to turn things around for the home side at the Estadio Municipal Butarque.
Per Sport's Angel Fabregues, Busquets said that "in two minutes they turned the game around and we lacked intensity."
"The worrying thing is conceding so many goals," he added.