Hernandez bagged his first two goals for Real on his season-long loan from Manchester United as Los Blancos put back-to-back domestic defeats behind them in emphatic fashion
However, the Mexican denied that the result was an example of perfection and claims that his teammates must still strive to improve.
"We must always keep improving," he told Canal Plus Liga. "Perfection doesn't exist. That's something I have been taught.
"We are not going to have the perfect match, you have to work hard and even though we've scored plenty of goals we still need to look to improve."
Cristiano Ronaldo netted a hat-trick in the rout, while Gareth Bale also picked up a brace. James Rodriguez scored his first La Liga goal for the club after his £63m move from AS Monaco in the summer.