Arsenal's Belgian forward Leandro Trossard bagged a second-half brace as the Gunners twice came from behind to defeat Spanish champions Barcelona 5-3 in a pre-season friendly in Los Angeles on Wednesday. Trossard netted in the 55th and 78th minutes as the English Premier League runners-up completed an emphatic victory at the SoFi Stadium in Inglewood. Arsenal have finished their USA tour whereas Barca will prepare for a fierce El Clasico against Real Madrid.