Philippe Coutinho has scored his first Barcelona goal, just minutes after coming on against Valencia as a half-time (46 minutes) substitute.
The Brazilian was dropped for the Copa del Rey semi-final second leg at Mestalla on Thursday, but came on at the break for the ineffective Andre Gomes.
And the 25-year-old made an instant impact, opening his Barcelona account in the 49th minute to give his side a 1-0 lead on the night, and a 2-0 advantage on aggregate.
Luis Suarez was the architect to his goal, going on a mazy run and crossing to the back post, where Coutinho slid in and finished low across the goalkeeper into the far post.
The win moves Barca into the final for a record fifth time running.
Barcelona will take on Sevilla, who topped Leganes in the other semi-final, in the Copa del Rey final.
Barça will be the first team to reach five consecutive in Copa Del Rey