Barca fired home three goals to win the tie 3-2 on aggregate.
Alba said, "The other day (against Granada) it was I who managed to force the extension and today it was (Gerard) Piqué. We have shown that we are a great team within the difficulties."
Regarding Ronald Koeman, Alba explained that "he has always been up front with the players and is doing a great job".
Indeed, he did not rule out being able to overcome the Champions League tie in Paris: "In the Champions League it is very difficult but we will go out to compete and play a good game.
"We have believed until the end, this gives us a great boost of morale. We are going to play a final and we have to win it."