The club has announced it will use the space traditionally reserved for player names to display the world 'Barcelona' to commemorate those who lost their lives.
The '#TotsSomBarcelona' hashtag, which translates as 'We Are All Barcelona', will also be emblazoned across the front of the famous first-team shirt for their league opener at Camp Nou.
Thirteen people died and more than 100 were injured when a van drove into pedestrians on the crowded Las Ramblas street, an incident that local police are treating as an act of terrorism.