DUBLIN, IRELAND - JULY 30: Sergi Roberto of Barcelona during the International Champions Cup series match between Barcelona and Celtic at Aviva Stadium on July 30, 2016 in Dublin, Ireland. (Photo by Charles McQuillan/Getty Images)
DUBLIN, IRELAND - JULY 30: Sergi Roberto of Barcelona during the International Champions Cup series match between Barcelona and Celtic at Aviva Stadium on July 30, 2016 in Dublin, Ireland. (Photo by Charles McQuillan/Getty Images)