Ainsley Maitland-Niles had a night to forget as his own goal and a Luis Suarez volley helped Barcelona to a 2-1 victory over Arsenal in the Joan Gamper Trophy.
Pierre-Emerick Aubameyang looked to have teed himself and the Gunners up for the new Premier League season in style with a fine first-half goal but Barcelona pressed in search of an error that eventually arrived when Maitland-Niles put through his own net.