Barcelona beat Juventus, 2-0, as Messi wrapped up the win in stoppage time.
This comes after the Spanish giants lost 3-1 to Real Madrid in El Clasico on Saturday before the club’s president Josep Maria Bartomeu announced his resignation on Tuesday.
However, they made it two wins from two in this season’s Champions League group stage with goals from Ousmane Dembele and Lionel Messi seeing off a poor Juventus side, who had Merih Demiral sent off late on for picking up a second yellow card.
“The best response we could give to the turmoil at the club is a display like this,” said Roberto.
“Everybody has been talking a lot but the team simply want to win games.”