Giorgi Mamardashvili urged unity from Valencia fans after defeat at Alaves.
The goalkeeper saved two penalties, but Alaves still won 1-0 on the day.
Mamardashvili later said: "We didn't play well today, but we have to keep going and come back stronger than we are now. I'm sure that we will.
"I think the team lacked concentration today. It's a tough place to play and having focus is very important here.
"We have to keep going."