Javier Mascherano is full of praise for new Barcelona teammate Alex Song.

The former Arsenal midfielder has been filling in at centre-half since his arrival.

Mascherano said: "He's done a great job in the short time that he's been here. I'm sure that as time goes on we'll get to see much more of his qualities. He comes from a team that's managed by a demanding manager, where they employ similar concepts to ours."