Two goals apiece from Pione Sisto and Iago Aspas helped Celta Vigo upset Roma in the Serie A's side final match of pre-season.
Roma signed off on their pre-season preparations in highly unconvincing fashion on Sunday, losing 4-1 away to LaLiga's Celta Vigo.
The Giallorossi are under fresh management in the form of vaunted sporting director Monchi and new head coach Eusebio di Francesco as they seek to improve on a second-place finish behind champions Juventus in Serie A last season.
They lost 2-1 to Monchi's former club Sevilla on Thursday, though, and left Spain with a bitter taste in the mouth following a heavy loss at Balaidos.