The victory was just Valladolid's fourth league win of the season, but they are now two points from safety with 17 matches remaining.
"This is going to be a turning point in our season. We showed real heart and effort here. I believe that this team can pull out of the relegation fight," he told reporters at a press conference.
"Now we have to do what we did here against other teams. We're going to lose a few, but with that sort of fight, we're going to win more."
There are just six points separating 17th position from eighth in La Liga.