Barca coach Ernesto Valverde started Semedo in his defence and was rewarded with an assured performance from the Portugal international.
Afterwards, Semedo declared: "Yes, I am very happy for my debut in the Spanish championship and for my debut at the Camp Nou, but I am still much happier for the victory of the team.
"I have found myself well. My colleagues have helped me a lot in this respect and that was noticed on the field."
"I want to continue playing with Leo here," he replied.