David Villa put Valencia ahead but an own goal by Raul Albiol made it a draw.
Tapia said: “Mentally this draw will help us.
“The second half was more even, but what I am most pleased about is the evolution from the first game we played against Valencia, when we lost at home and played terribly. The work has paid off and today we played an excellent game.
“I am happy with the play and attitude of the team.”