Ousmane Dembele struck early and Lionel Messi converted a late penalty as Barcelona won 2-0 at Juventus in the Champions League on Wednesday after Alvaro Morata had three goals disallowed for offside for the Serie A side.
Dembele struck with a deflected shot in the 14th minute for a Barcelona side smarting from Saturday's home defeat by Real Madrid and rocked by the resignation of club president Josep Maria Bartomeu on Tuesday.
Messi capped a fluid display from Ronald Koeman's side by firing home the 14th penalty of his Champions League career to seal Barca's first-ever win over Juventus in Turin and leave them top of Group G with six points from two games.
Juventus, still missing Cristiano Ronaldo after he tested positive for COVID-19 two weeks ago and still rebuilding under Andrea Pirlo, failed to record a shot on target despite Morata's efforts.
Barca had three chances to take the lead in an extraordinary opening two minutes.