The Catalan side said they will be presented with the league trophy on Friday during a special celebration in the city.
The shouts of "No tinc por!" (I am not afraid) rang out across Barcelona's Plaa de Catalunya, repeated rhythmically by the thousands of people who had gathered at noon in the hot sun to pay respects to the dead and injured after Thursday's terrorist attack.
The Islamic State has claimed responsibility for the attack. According to US monitor SITE Intelligence Group, the extremist group's propaganda outlet AMAQ claimed that the executors of the attack were soldiers of the Islamic State.
Younes Abouyaaqoub, a 22-year-old Moroccan national, was killed during an operation in Subirats.
British daily The Times splashed "In the hands of God" with the image of Maradona celebrating after beating West Germany in the final of the 1986 World Cup.
Barcelona's players will bear the city's name on the back of their shirts in tribute to the victims of Thursday's deadly attack in the Catalan capital when they play Real Betis in La Liga on Sunday, the club said in a statement.
American Haley Anderson claimed the first gold medal of the world swimming championships when she pipped Brazil's Poliana Okimoto to the line to win the women's open water 5km event on Saturday.
World leaders are united in their condemnation of terrorist attack in Spain.
Laila Rouass, 46, who was on a holiday in the city with her 10-year-old daughter Inez Khan, live tweeted from her hideout as the attack unfolded in the busy Las Ramblas area of the city.
Winning goals from Luis Suarez and Neymar on the counter-attack to sink Juventus in the Champions League final encapsulated the new direct play from Barcelona that saw them become the first European side to win the treble for the second time.
Scotland Yard has launched an investigation after a 26-year-old man stopped his car and then wielded a large knife.